53 calculators and 50 interactive tools for planning, shooting and finishing nature photographs. Everything runs in your browser — no sign-up, and your photos never leave your device.
Light & sky (11)
Golden Hour Calculator
Golden hour and blue hour calculator: morning and evening golden hour, sunrise, sunset and twilight for any location and…
Tool →Moon Phase Calendar
Monthly moon phase calendar with illumination for every day — plan full moonrise shots and dark nights for the Milky Way…
Tool →Sun & Moon Position Map
See sunrise, sunset, moonrise and moonset directions drawn on a map for any place and date, plus the sun and moon positi…
Tool →Moonrise & Moonset Calculator
Moonrise and moonset times, direction and illumination for tonight and the next 30 days at any location.…
Tool →Light Pollution Checker
Estimate the Bortle class, sky brightness (SQM) and naked-eye limiting magnitude for any coordinates in the U.S., and se…
Tool →Aurora Forecast Checker
Will you see the aurora tonight? Combines NOAA's 3-day Kp forecast with your geomagnetic latitude to show your chances, …
Tool →Solar Alignment Finder (Manhattanhenge)
Find the dates when the sun rises or sets exactly along a street, a valley, a bridge or an arch — the calculator behind …
Tool →Daylight Chart (Sunrise & Sunset All Year)
A year-long chart of sunrise, sunset, golden hour and twilight for any location — see how the light changes month by mon…
Tool →Sun Path Diagram
Interactive sun path diagram for any location: the sun's arc for your date and both solstices, with a time slider showin…
Tool →Meteor Shower Planner
Pick a meteor shower and your location to get the peak night's best viewing time, radiant altitude, moon conditions and …
Tool →Golden Hour Countdown
A live countdown to the next golden hour, sunset, blue hour and sunrise at your location — keep it open while you scout.…
Tool →Astro (10)
NPF Rule & 500 Rule Calculator
NPF rule and 500 rule calculator for astrophotography: the longest exposure before stars trail, for your camera's pixel …
Calculator →Milky Way Planner
Free Milky Way planner: when the galactic core rises, peaks and sets, the dark window, and the moon — for any location a…
Tool →Star Trail Calculator
Plan star trail images: number of frames, total arc length and gap time from exposure, interval and total shooting time.…
Calculator →Star Trail Length Calculator
How long will star trails be in pixels? Enter focal length, pixel pitch, exposure time and declination to see trail leng…
Calculator →Astrophotography Stacking Calculator
Plan a stack: total integration time, signal-to-noise improvement, noise reduction in stops, session length and storage …
Calculator →Astrophotography Image Scale Calculator
Arcseconds per pixel, field of view in degrees and sampling vs. seeing for any camera and lens or telescope.…
Calculator →SQM to Bortle Converter
Convert a Sky Quality Meter reading (mag/arcsec²) to Bortle class and naked-eye limiting magnitude.…
Calculator →Meteor Shower Rate Calculator
Estimate visible meteors per hour from the shower's ZHR, radiant altitude, sky darkness (limiting magnitude) and clouds.…
Calculator →Aurora Kp Latitude Calculator
Enter your latitude and longitude to get your geomagnetic latitude and the approximate Kp index needed to see the aurora…
Calculator →Moon Size in Photo Calculator
Size of the moon (or sun) on your sensor and in pixels for any focal length — and the lens needed for a frame-filling mo…
Calculator →Exposure (15)
ND Filter Calculator
ND filter exposure calculator: new shutter speed for 1–20 stop neutral density filters, with filter factor and optical d…
Calculator →Exposure Value (EV) Calculator
Calculate exposure value from aperture, shutter speed and ISO, find equivalent exposures and the approximate scene brigh…
Calculator →Sunny 16 Calculator
Sunny 16 rule calculator: pick the light (snow, bright sun, overcast, shade) plus ISO and aperture to get the right shut…
Calculator →Lux to Exposure Calculator
Convert illuminance in lux (from a light meter or phone app) to exposure value and camera settings for any ISO and apert…
Calculator →Exposure Stops Converter
Convert photographic stops into light factor, percent transmission, ND filter number and optical density — including fra…
Calculator →ISO Equivalent Exposure Calculator
Change ISO without changing brightness: get the equivalent shutter speed or aperture for your new ISO.…
Calculator →HDR Bracketing Calculator
Calculate the number of bracketed exposures and EV offsets needed to cover a high-contrast scene with your camera's dyna…
Calculator →Moon Exposure Calculator (Looney 11)
Correct exposure for photographing the moon: Looney 11 rule with phase corrections for gibbous, quarter and crescent moo…
Calculator →Reciprocity Failure Calculator (Ilford)
Correct long film exposures for reciprocity failure using Ilford's published exponent for HP5 Plus, FP4 Plus, Delta, Pan…
Calculator →Video Shutter Angle & ND Calculator
Find the shutter speed for any frame rate and shutter angle (180° rule) and how many stops of ND you need to get there i…
Calculator →Dynamic Range Converter
Convert dynamic range between photographic stops, contrast ratio and decibels.…
Calculator →Inverse Square Law Calculator
How much light changes when you move a light or flash: intensity ratio and stops for any change in distance.…
Calculator →Color Temperature & Mired Calculator
Convert between color temperatures with mired shift — find how strong a warming or cooling gel or filter you need.…
Calculator →Long Exposure Timer (ND)
Calculate your ND filter exposure and run a countdown timer with beeps for bulb-mode long exposures — works on your phon…
Tool →Printable Hyperfocal Chart
Generate a printable hyperfocal distance card for your sensor and lenses, in meters and feet — keep it in your camera ba…
Tool →Optics (13)
Depth of Field Calculator
Free depth of field calculator: near and far limits of sharpness, total DoF and hyperfocal distance for any sensor, foca…
Calculator →Hyperfocal Distance Calculator
Calculate the hyperfocal distance for any focal length, aperture and sensor — plus a full chart from f/1.4 to f/22. Focu…
Calculator →Crop Factor Calculator
Convert focal length and aperture between full frame, APS-C, Micro Four Thirds, 1-inch and medium format — equivalent fi…
Calculator →Field of View Calculator
Horizontal, vertical and diagonal angle of view for any focal length and sensor, plus how wide the frame is at a given d…
Calculator →Focus Stacking Calculator
How many frames do you need for a focus stack? Enter focal length, aperture, sensor and the near and far limits to get t…
Calculator →Diffraction Limit Calculator
Find the aperture where diffraction starts to soften images on your sensor: Airy disk size vs. pixel pitch for any f-num…
Calculator →Flash Guide Number Calculator
Use your flash guide number to find the maximum flash distance at any aperture and ISO, or the aperture for a given dist…
Calculator →Teleconverter Calculator
What does a 1.4×, 1.7× or 2× teleconverter do to your lens? New focal length, maximum aperture and stops of light lost.…
Calculator →Extension Tube Magnification Calculator
How much magnification do extension tubes add? Enter focal length and tube length to get added and total magnification a…
Calculator →Macro Effective Aperture & DoF Calculator
Effective f-number, exposure loss and depth of field at macro magnifications (bellows factor), for any sensor.…
Calculator →Focal Length From Field of View
Find the focal length that gives a desired horizontal angle of view or frames a subject of known width at a given distan…
Calculator →Subject Size in Frame Calculator
How large a bird, animal or building will appear on your sensor: size in mm, pixels and percent of frame for any focal l…
Calculator →Distance From Object Size Calculator
Estimate distance to a subject of known size from its size in pixels, focal length and pixel pitch.…
Calculator →Field (11)
Time-Lapse Calculator
Time-lapse calculator: number of frames, final clip length, speed-up and memory card space from interval, shooting time …
Calculator →Panorama Calculator
Plan a stitched panorama: number of frames for any angle, focal length and overlap, plus final pixel size and megapixels…
Calculator →Handheld Shutter Speed Calculator
Slowest safe handheld shutter speed for any focal length, sensor and image stabilization rating, with a high-resolution …
Calculator →Motion Blur Shutter Speed Calculator
Fastest shutter speed needed to freeze birds, wildlife, cars or water: blur in pixels from subject speed, distance, foca…
Calculator →Drone GSD Calculator
Ground sampling distance (cm per pixel) and photo footprint for any drone altitude, sensor and lens.…
Calculator →Horizon Distance Calculator
Distance to the horizon from any height, the maximum distance you can see a tall object, and how much of it the Earth's …
Calculator →Temperature at Altitude Calculator
Estimate the temperature at a summit or high trailhead from a valley forecast using the atmospheric lapse rate.…
Calculator →Dew Point & Lens Fog Calculator
Dew point from temperature and humidity, the temperature spread, and the risk of dew on your lens during night photograp…
Calculator →Wind Chill Calculator
How cold will it feel? NWS wind chill from temperature and wind speed, plus frostbite timing for winter shoots.…
Calculator →Solar Noon & Day Length Calculator
Solar noon, day length, maximum sun altitude and sunrise/sunset azimuth for any latitude, longitude and date.…
Calculator →Shadow Length & Sun Angle Calculator
Shadow length of any object from the sun's altitude — or the sun angle from a measured shadow. Includes the sun's altitu…
Calculator →Planning (9)
Photo Trip Planner
One page for planning a shoot: sunrise, sunset, golden and blue hour, moon, Milky Way window, NWS forecast with cloud co…
Tool →Sunset & Sunrise Color Forecast
6-day sunrise and sunset color forecast from National Weather Service sky cover, rain chance and humidity — with a simpl…
Tool →Drone No-Fly Checker
Check a location against FAA UAS Facility Map airspace grids near airports and National Park Service boundaries before f…
Tool →Photography Packing Checklist
Build a printable photography packing checklist for landscape, astro, wildlife, waterfalls, winter, desert, beach and ba…
Tool →Shot List Planner
Plan a photo trip shot by shot: location, time, lens and notes — sorted, printable and saved in your browser.…
Tool →GPS Coordinates Converter
Convert GPS coordinates between decimal degrees, degrees-minutes-seconds and UTM, with map links — for photo locations a…
Tool →Bearing & Distance Calculator
Great-circle distance, compass bearing and midpoint between two coordinates — plan alignments with peaks, lighthouses an…
Tool →Time Zone Converter for Shoots
Convert a date and time between U.S. time zones and UTC — handy for remote shoots, live streams and meteor shower peaks.…
Tool →Tide Finder for Photographers
Find the nearest NOAA tide stations to any coastal location and see high and low tide predictions with a tide curve — pl…
Tool →Files (7)
Print Size Calculator
Maximum print size from image pixels at 150, 200, 240 and 300 ppi, in inches and centimeters.…
Calculator →Aspect Ratio Calculator
Find the aspect ratio of any image size and the crop needed for Instagram 4:5, 1:1, 16:9, 3:2 and more.…
Calculator →Megapixel Calculator
Convert image dimensions to megapixels, or megapixels and aspect ratio to width and height in pixels.…
Calculator →Memory Card Calculator
How many RAW or JPEG photos fit on a 32, 64, 128, 256 or 512 GB card, and how many minutes of video at any bitrate.…
Calculator →RAW File Size Calculator
Estimate RAW file size from megapixels, bit depth (12/14/16-bit) and compression — and how many fit per GB.…
Calculator →File Transfer Time Calculator
How long will it take to offload your card? Transfer time for any amount of data over SD, CFexpress, USB and Wi-Fi.…
Calculator →Screen PPI Calculator
Calculate pixels per inch of any display from its resolution and diagonal — for editing and viewing photos.…
Calculator →Photo lab (16)
EXIF Viewer
Free online EXIF viewer: camera, lens, shutter speed, aperture, ISO, focal length, date and GPS location from JPEG, DNG,…
Tool →EXIF Remover
Remove EXIF metadata — including GPS location — from photos before sharing. Processed locally in your browser; download …
Tool →Shutter Count Checker
Check the shutter count from an unedited photo, read locally in your browser. Works with Nikon (JPEG/NEF) and recent Fuj…
Tool →Image Resizer
Resize photos by pixels or percent with high-quality resampling, choose JPEG, PNG or WebP, and download — all in your br…
Tool →Image Compressor
Compress JPEG and WebP photos in your browser: choose quality and maximum size, compare before/after file size, download…
Tool →Image Format Converter
Convert images between JPEG, PNG and WebP in your browser, with a background color for transparent PNGs.…
Tool →Aspect Ratio Cropper
Crop photos to Instagram 4:5, square 1:1, 16:9, 3:2, 5:4 and more, choosing exactly which part to keep — in your browser…
Tool →Instagram Grid Splitter
Split a panorama or photo into a 3×1, 3×2 or 3×3 Instagram grid, numbered in posting order — in your browser.…
Tool →Panorama Carousel Splitter
Split a panorama into 2–10 seamless carousel slides (4:5 or 1:1) for swipeable Instagram posts.…
Tool →Color Palette From Photo
Extract a 5–10 color palette from any photo with HEX and RGB codes — copy swatches or download the palette image.…
Tool →Histogram & Clipping Checker
See the RGB and luminance histogram of any photo, the percentage of clipped shadows and highlights, and a zebra overlay …
Tool →Focus & Sharpness Checker
Score photo sharpness and show a focus map of the sharpest regions — compare frames to pick the sharpest shot.…
Tool →Before & After Comparison
Compare two photos with an interactive slider and export a labeled side-by-side before/after image.…
Tool →Composition Grid Overlay
Overlay rule of thirds, golden ratio (phi) grid, golden spiral, diagonals or a center cross on your photo to analyze com…
Tool →Film Negative Converter
Convert phone or camera scans of film negatives to positives: removes the orange mask with per-channel levels, with B&W …
Tool →White Balance (Kelvin) Preview
Preview white balance changes on a photo with Kelvin temperature and tint sliders, and see what each color temperature l…
Tool →Creative (11)
Online Kaleidoscope Maker
Free online kaleidoscope generator: upload a photo and create 4, 6, 8, 12, 16 or 24-mirror kaleidoscopes and square four…
Tool →Photography Prompt Generator
Stuck for ideas? Generate random nature photography prompts that combine a subject, a technique and a constraint — or ge…
Tool →Tiny Planet Maker
Create tiny planet (little planet) and rabbit-hole images from panoramas with zoom and rotation controls — in your brows…
Tool →Mirror & Symmetry Effect
Create mirror and symmetry effects: reflect the left, right, top or bottom half, or make a four-way reflection — in your…
Tool →Triptych & Photo Grid Maker
Combine two to four photos into a diptych, triptych or 2×2 grid with gaps and a background color — download a single ima…
Tool →Film Simulation Filters
Apply film-inspired looks — warm portrait film, vivid slide film, classic black-and-white, faded matte and cinematic tea…
Tool →Black & White Converter
Convert photos to black and white with a channel mixer and classic color-filter presets, plus contrast — in your browser…
Tool →Photo Border & Frame
Add a white or colored border, a Polaroid-style frame with caption or a film-strip border to photos — fit any aspect rat…
Tool →Watermark Photos
Add a text watermark or © copyright line to photos with size, opacity, position and shadow controls — processed in your …
Tool →Star Trail Stacker
Stack a sequence of night frames into a star-trail image with lighten blending and optional comet-style fading — in your…
Tool →Image Averager (Long Exposure Simulator)
Average a burst to simulate a long exposure or reduce noise, or median-stack to remove moving people — in your browser.…
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