tools.rodrigopolo.com

A time-lapse calculator turns three inputs — how long you can shoot in real life, how long the final clip should run, and the output frame rate — into two settings you actually enter on the camera: the shooting interval and the total number of frames. Use it whenever you know your event duration or your target clip length but not the interval. The math is simple enough to do by hand, but a calculator removes rounding errors and lets you test several intervals quickly. The time-lapse tools listed on Rodrigo's Tools (including a Canon-specific and a GoPro-specific calculator) are built for exactly this conversion.

The three inputs and the two outputs

Every time-lapse calculation rests on this relationship:

Total frames = output clip length × output frame rate

Interval = real-world shooting duration ÷ total frames

So you need:

Outputs: total frames (how many shots to take) and interval (seconds between shots).

Worked example

A sunset runs about 2 hours. You want a 20-second clip at 24 fps.

1. Total frames = 20 × 24 = 480 frames
2. Interval = 7,200 s ÷ 480 = 15 seconds

Set the camera to a 15-second interval and 480 shots, and the clip will play back at 20 seconds. If your camera only offers whole-second intervals, 15 s is already clean — but see the rounding section below when it isn't.

Step by step

1. Fix the frame rate first. Decide whether the final video is 24, 25, or 30 fps. This is a project decision, not a camera setting — changing it later changes the frame count.
2. Enter shooting duration and output length, then read the interval.
3. Round the interval to a value your camera supports (many cameras step in whole seconds, some allow fractions).
4. Recalculate the clip length from the rounded interval: new total frames = shooting duration ÷ rounded interval; new clip length = new total frames ÷ frame rate.
5. Check the result against your target. If it drifted, either accept the new length or adjust the shooting duration.
6. Confirm the camera can take that many shots and that battery and card capacity will last the full shoot.

Handling camera limits and rounding

The calculator gives an ideal number; the camera gives you a discrete one. Three limits matter:

• Minimum interval. If the ideal interval is shorter than the camera's minimum, you cannot shoot that fast — lengthen the shooting duration or shorten the target clip.
• Maximum shots. Some cameras cap the frame count per sequence. If total frames exceeds the cap, split the shoot or lower the frame rate.
• Interval vs. frame counting. Know whether your camera counts intervals or frames when you set the shot limit — a 480-frame plan may need to be entered as 479 intervals depending on the model. The Canon and GoPro calculators on the site exist partly because these conventions differ between brands.

Rounding example

Suppose the ideal interval is 13.7 seconds but the camera only accepts whole seconds. Round to 14 s:

• New total frames = 7,200 ÷ 14 ≈ 514 frames
• New clip length = 514 ÷ 24 ≈ 21.4 seconds

That is 1.4 seconds longer than planned. If exact length matters, shorten the shoot to 6,720 s (1 h 52 min) at 14 s to land back on 480 frames.

Troubleshooting common mismatches

The battery and card check is the one people skip. Multiply your file size per frame by the total frame count to get required storage, and compare against the camera's rated battery life at your chosen interval — long intervals with the camera awake can drain power faster than expected.

Where the calculator fits

Rodrigo's Tools groups a Frames ⇄ Time Calc alongside dedicated Canon and GoPro time-lapse calculators, plus related utilities like an exposure calculator and a bandwidth calculator. If you shoot on a specific brand, start with that brand's calculator so the interval and frame-count conventions match your camera menu; use the generic frames-to-time tool when you just need the arithmetic for any camera.

Video calculators are small web utilities that compute video-specific values — frame counts, clip durations, time-lapse intervals, output dimensions, and file transfer times — so you don't have to do the arithmetic by hand. On Rodrigo's Tools (tools.rodrigopolo.com), the video-relevant set is clearly separated from the photography tools: Frames ⇄ Time Calc, Canon Time-lapse Calc, GoPro Time-lapse Calc, Video Dimensions Calc, Bandwidth Calculator, and MP4Box Aspect Fix, alongside adjacent utilities like the Film Resolution Calculator and EXIF Reader. Use them when your question is about time, frames, or pixels in motion; reach for the crop factor or exposure calculators when the question is about light or lens coverage.

The four core video tasks these tools cover

1. Frame and time conversion

Frames ⇄ Time Calc converts between a frame count and a duration at a given frame rate. This is the tool for questions like "how long is 1,440 frames at 24 fps?" or "how many frames fit in a 12-second shot at 30 fps?" The input is a number plus a frame rate; the output is the matching value in the other unit. The frame rate you enter must match the rate you'll actually shoot or edit at — 23.976, 24, 25, 29.97, 30, 50, 59.94, and 60 are all different, and a mismatch silently shifts your result.

2. Time-lapse interval planning

Two dedicated calculators exist because the math differs by camera: Canon Time-lapse Calc and GoPro Time-lapse Calc. Both take a shooting duration and a desired final clip length, then work out the interval between frames and the total frame count. The split matters: Canon bodies and GoPro action cams expose interval settings differently, so pick the calculator that matches the camera you'll actually configure. If you're planning a sunset sequence, for example, you'd enter the real-world duration of the light change and the length of the finished clip, then set the camera's interval to the returned value.

3. Video dimensions and aspect ratios

Video Dimensions Calc handles output sizing — useful when you need to know what a given resolution or aspect ratio works out to in pixels, or how a crop changes your frame. MP4Box Aspect Fix is the repair tool for the opposite problem: footage whose stored aspect ratio doesn't match its actual pixels. Film Resolution Calculator sits nearby for resolution comparisons across formats.

4. Bandwidth and delivery estimates

Bandwidth Calculator estimates transfer time from file size and connection speed. Use it before an upload or a shoot-day offload to know whether a 40 GB card dump fits your window. The result is only as good as your inputs — enter the real sustained speed, not the marketing number on the connection.

Video calculator vs. photography calculator

The dividing line is simple: if the answer changes when the clock or the frame counter moves, it's a video calculator. If it changes when the lens or the light changes, it's a photography calculator. Some jobs need both — a crop-factor check to pick the lens, then a frame/time check to plan the shot length.

How to pick the right one and avoid the usual errors

1. Name the unit you have and the unit you want. Frame count, seconds, minutes, pixels, gigabytes — write both down before opening a tool. Most wrong answers come from feeding seconds into a field that expects frames.
2. Confirm the frame rate convention. Drop-frame rates (29.97, 59.94) behave differently from integer rates. If your project is broadcast or web-delivered at 29.97, don't compute at 30 and round.
3. Match the time-lapse calculator to the camera. A Canon interval setting and a GoPro interval setting are not interchangeable; using the wrong one gives you a plan your camera can't execute.
4. Check aspect-ratio rounding. Dimensions calculators return whole pixels; a 2.39:1 frame at a given width won't land on an integer height. Decide whether you're rounding up (and cropping) or letterboxing before you commit.
5. Verify with a second method. For frame/time conversions, multiply frames by the frame duration by hand once. If the tool and your hand calculation disagree, one of your inputs is wrong.

What's on the page and what to expect

The tools index lists these as web utilities in a single collection, described as "a collection of (some old) visual and media calculators and more." That phrasing is worth taking literally: several are long-standing utilities rather than actively maintained products, so treat outputs as calculations to sanity-check, not as authoritative specs. The site's own description calls the collection free, and no pricing or login signals appear in the page evidence — but absence of a paywall mention isn't a guarantee of unrestricted access, so confirm on the page itself if access matters to your workflow.

For most video work, the practical starter set is three tools: Frames ⇄ Time Calc for timing, the time-lapse calculator matching your camera for interval planning, and Video Dimensions Calc for output sizing. Add the Bandwidth Calculator when delivery time is the constraint, and keep EXIF Reader handy to confirm what frame rate and resolution a file actually carries before you compute anything from it.

Panorama tools are small utilities that handle the non-obvious parts of 360° work: writing the metadata platforms need to recognize a photo as spherical, planning how many rows and frames a scene requires, calculating crop values, and checking how a projection will look. On Rodrigo's Tools, four of them map directly to those jobs: 360° Pano Metadata Gen, GPano Visualizer, 360° Panorama Row Calc, and 360° Panorama Crop Calc. You need the metadata generator and visualizer for publishing, the row calculator before you shoot, and the crop calculator when you edit.

The four panorama tools and what each one solves

360° Panorama Row Calc: plan the capture

Use this when you know your lens and want to avoid guessing at coverage. It helps you work out the row structure of a multi-row panorama — how the scene divides into horizontal bands and how many frames each band needs.

The input is your shooting setup (focal length and the field of view it produces), and the output is a row plan you can follow on set. The expected result is full coverage with deliberate overlap rather than a stitched image with a hole at the zenith or nadir. The common failure here is under-shooting the top and bottom rows, which only becomes visible after stitching.

360° Pano Metadata Gen: make the file spherical

A 360° photo is just a wide image until it carries GPano metadata. This tool generates that metadata block so platforms and viewers know the image is an equirectangular panorama and how it should be projected.

Typical inputs are the image dimensions and the projection details; the output is metadata you attach to the file. The expected result is that a viewer opens the photo as an interactive sphere instead of a stretched strip. The most common failure is missing or partial metadata — the image uploads fine but displays flat, and nothing in the file tells you why.

GPano Visualizer: verify before you publish

This is the check step for the previous tool. It shows you how the GPano metadata is being interpreted, so you can confirm the projection and framing are what you intended.

Use it after generating metadata and before uploading anywhere that matters. If the visualizer shows the wrong orientation or a broken projection, fix the metadata now rather than after a platform has cached a flat version.

360° Panorama Crop Calc: keep the frame valid

Cropping a panorama is where seams and black edges appear. This calculator derives crop values that preserve the equirectangular relationship between width and height.

The input is your source dimensions and intended crop; the output is the crop parameters to apply. The expected result is a tighter frame that still projects correctly. The failure mode is an arbitrary crop that breaks the 2:1 relationship or clips the poles, producing visible seams or black bands in the viewer.

How to choose by task

• Planning a shoot: start with the Row Calc. Decide rows and frames before you leave, because this is the decision that is expensive to fix later.
• Publishing a finished panorama: use the Metadata Gen, then confirm with the GPano Visualizer. Treat these as a pair — generating without verifying is how flat-looking 360° photos happen.
• Editing an existing panorama: use the Crop Calc whenever you change framing, and re-check the result in a viewer afterward.

If you only do one thing, verify metadata with the visualizer on any panorama you publish. It catches the single most common reason a 360° photo fails to display as one.

Where these fit in the wider toolkit

Rodrigo's Tools is a collection of visual calculators for photography, video, and 360° workflows, and the panorama set sits alongside related utilities such as the Map Projection tool and the Equatorial Mount calculator. If your work crosses into general capture planning, the crop factor and exposure calculators on the same page cover the non-panorama side. The site describes the collection as free; no pricing or login requirements are stated in the available material, so confirm access on the page itself before relying on it in a paid workflow.

Online camera tools are browser-based calculators and utilities that handle the math and metadata chores around shooting: exposure settings, crop factor, time-lapse intervals, frame timing, EXIF inspection, video dimensions, bandwidth, and 360° panorama metadata. You need them when you want a quick answer before a shoot or a sanity check after one, without opening a spreadsheet or editing suite. A representative free collection is Rodrigo's Tools (tools.rodrigopolo.com), which groups these calculators on a single page. Pick tools by task: exposure and crop factor for lens and light planning, time-lapse and frame calculators for scheduling, EXIF for inspecting what a camera actually recorded, and panorama or video utilities for delivery formats.

The main categories and what each one answers

The site also lists narrower utilities (film resolution, focal length graph, equatorial mount, pixel binning example, SRT to XML, regex helper, bookmarklet generator), which are useful only if your workflow touches those specific tasks.

Matching a task to a tool

Planning a time-lapse

Use a time-lapse calculator when you know the scene duration and want a smooth result. Inputs are typically the total shooting time and the desired interval (or frame rate for the final clip); the output is the number of frames and the resulting clip length. For example, a 2-hour event shot at a 5-second interval yields 1,440 frames, which at 24 fps is a 60-second clip. Check the output against your card capacity and battery life before committing.

Checking lens equivalence

A crop factor calculator converts a focal length and aperture between sensor sizes. Enter the focal length and the source and target sensor formats; the output tells you the equivalent field of view (and often the equivalent aperture for depth of field). Use it when renting a body with a different sensor size or comparing a phone to a full-frame camera.

Inspecting a shot

An EXIF reader takes an image file and displays the recorded settings: shutter, aperture, ISO, focal length, and often lens and camera model. This is the fastest way to learn from a photo you like or to confirm a camera actually applied the settings you intended.

Preparing panorama or video output

For 360° work, the row and crop calculators help you plan how many rows and what crop a panorama needs, while the GPano visualizer checks whether the embedded panorama metadata is correct. For standard video, the dimensions calculator and MP4Box aspect fix address resolution and aspect mismatches before upload.

How to interpret results correctly

• Formulas are approximations. Calculators use standard photographic relationships; real sensors, lenses, and compression deviate slightly. Treat results as planning targets, not guarantees.
• Metadata depends on the file. EXIF and panorama metadata are only as good as what the camera or software wrote. Missing or stripped metadata produces empty or partial results.
• File handling happens in your browser. Uploading a file to a web tool means it is processed client-side or sent to a server depending on the tool; for sensitive images, prefer tools that state local processing.
• Outputs are inputs to a decision. A time-lapse frame count still has to fit your storage; an equivalent focal length still has to suit your composition.

When these tools are the right choice — and when they aren't

Use them for quick pre-shoot planning (interval, exposure, lens choice), post-shoot inspection (EXIF), and format checks (video dimensions, panorama metadata). They are not replacements for your camera's menus, which apply settings directly, or for editing software, which does the actual correction and export. If a task requires precise color management, RAW development, or batch processing, use dedicated software; if you need a one-off number in under a minute, a browser calculator is faster.

The site's collection is described as free, but no pricing or login details are stated on the page, so confirm access requirements yourself before relying on it in a time-sensitive workflow.

Photography calculators are small web or app utilities that turn a photographic decision into a number: equivalent focal length, exposure time, frame count, file size, or panorama grid. You need one when the answer depends on a formula rather than taste — for example, matching a lens across sensor sizes or working out how many frames a time-lapse will take. You can skip them when the camera already displays the value or when the decision is purely aesthetic. Rodrigo's Tools (tools.rodrigopolo.com) is one free collection of visual calculators for photography, video, and 360° panorama work, and it is a useful reference for the categories below.

The main types of photography calculators

Most calculators fall into a few families. Knowing the family tells you what inputs to gather before you open the tool.

Rodrigo's Tools lists examples in most of these groups, including a Crop Factor Calculator, Exposure Calculator, Megapixel calculator, Frames ⇄ Time Calc, Canon and GoPro time-lapse calculators, 360° Panorama Row Calc and Crop Calc, Bandwidth Calculator, and EXIF Reader.

How the core calculators work

Crop factor

Crop factor compares a lens on one sensor size with the same lens on a reference format, usually full frame (35mm). The usual formula is:

equivalent focal length = focal length × crop factor
equivalent aperture    = aperture    × crop factor   (for depth-of-field comparison)

For example, a 35mm lens on an APS-C body with a 1.5× crop factor gives roughly a 52mm full-frame equivalent field of view. The aperture conversion is about depth of field and background blur, not exposure — f/2 on APS-C behaves like about f/3 in full-frame depth-of-field terms, while the light per area is unchanged. Use the calculator when you are choosing a lens for a second body or comparing a compact camera's specs with a DSLR; verify against your camera's own crop factor, since it varies by model.

Exposure

Exposure calculators work from the reciprocity of aperture, shutter speed, and ISO: closing the aperture by one stop requires doubling the shutter time or doubling ISO to keep the same brightness. A calculator is most useful when you change one variable and want the matching values for the others, or when you are converting a light-meter EV reading into camera settings. The output is a set of equivalent combinations, not a single "correct" exposure — you still choose which combination suits the subject. Check the result against your camera's meter before shooting.

Time-lapse and frame counts

Time-lapse planning is arithmetic: total frames equals clip length multiplied by frame rate, and shooting duration equals total frames multiplied by the interval.

frames   = clip length (s) × frame rate (fps)
duration = frames × interval (s)

For example, a 10-second clip at 24 fps needs 240 frames; at a 5-second interval that is 1,200 seconds, or 20 minutes of shooting. Use a time-lapse calculator when the interval, clip length, and card capacity all have to agree. Rodrigo's Tools separates Canon and GoPro time-lapse calculators, which is a reminder that some cameras have their own interval limits — confirm the interval your camera actually accepts.

Megapixels and print size

The megapixel calculator converts pixel dimensions into megapixels and, with a DPI value, into print dimensions. It answers questions like "is this file enough for an A3 print at 300 DPI?" The formula is pixels ÷ DPI = inches. Treat the result as a planning estimate: print labs and viewing distance change what resolution is acceptable.

Panorama and 360° tools

For stitched panoramas, the row and crop calculators estimate how many rows and columns you need from focal length, sensor size, and overlap, and how much to crop each frame. These are the calculators most worth using before a shoot, because a wrong grid means reshooting. The same collection includes a GPano metadata generator and visualizer for 360° files, which helps when you need to embed or check panorama metadata after stitching.

How to choose the right calculator for your task

Work backwards from the decision you are about to make:

• Buying or adapting a lens → crop factor calculator, then check the equivalent aperture for depth of field.
• Shooting manually in changing light → exposure calculator for equivalent settings, confirmed with the camera meter.
• Planning a long time-lapse → frames ⇄ time or a camera-specific time-lapse calculator, plus a bandwidth or storage check for the card.
• Preparing a print or delivery → megapixel calculator with your target DPI.
• Shooting a stitched panorama → panorama row and crop calculators before you leave.
• Checking a file after the fact → EXIF reader.

If two calculators could apply, use the one whose inputs you already know. A calculator that needs a sensor specification you cannot confirm will produce a confident-looking wrong answer.

Limitations and verification

Calculators are only as good as their inputs and assumptions. Crop factor depends on the exact sensor dimensions, which differ between cameras that share a nominal size. Exposure calculators assume a consistent stop scale and do not account for filters, bellows extension, or light loss. Time-lapse math ignores battery life, card write speed, and camera buffer limits. Panorama estimates depend on the overlap you actually achieve in the field.

A practical rule: use the calculator to plan, then verify with one test frame, one test exposure, or one short test sequence before committing to the full shoot. Where the camera displays the same value — equivalent focal length in a menu, the meter in the viewfinder, the frame counter — trust the camera and use the calculator as a cross-check.

Fitting calculators into a real workflow

Calculators earn their place at three points: before the shoot (crop factor, panorama grid, time-lapse interval), during the shoot (exposure equivalents when light changes faster than you can meter), and after the shoot (megapixels for output, EXIF for records, bandwidth for delivery). Keeping one bookmark folder of the handful you actually use — rather than the full list — is usually faster than searching each time. Rodrigo's Tools is one place to start; the categories above tell you which entries are worth keeping.