Travel Photography

Calculate diagonal angle-of-view focal-length equivalence from actual focal length and exact source/reference image-area width and height.

Calculate thin-lens near/far focus limits and hyperfocal distance from actual focal length, focus distance, f-number, and an entered CoC criterion.

Calculate EV100 and ISO-normalized setting indexes plus an equal-exposure shutter time from aperture, seconds, ISO, and comparison aperture.

Translate a documented or tested flash guide number to a target ISO, then solve a nominal direct-flash f-number or same-unit distance.

Calculate thin-lens hyperfocal distance and its exact entered-criterion near limit from actual focal length, taking f-number, and explicit circle of confusion.

Calculate the largest whole-pixel golden-ratio candidate rectangle inside a source image, including exact edge exclusions and retained pixels.

Calculate print size at entered image PPI, then audit retained pixels, fill crop, effective PPI, and pixel differences for one exact target.

Simple in-browser notepad with auto-save. Write quick notes that persist in your browser. Download as text file. No signup needed.

Compare two observed offers on one explicit shared denominator, with auditable unit prices, differences, and a true tie state.

Compare subscription and phone plan cash costs, including prepaid bills, promotions, fees, devices and switching costs. Save and restore your draft.

Estimate a USD trip budget with separate travel days and hotel nights, rooms, meals, group costs and an allowance; save and compare your planning cases.

Calculate fuel gallons and cost from total trip miles, expected US MPG and an entered price per US gallon. Save planned or observed cases.

Generate a personal packing checklist with explicit laundry intervals. Edit items and quantities, check packed rows, save locally and download Markdown.

Record USD travel receipts and refunds by payer and category, then separately reconcile an approved reimbursement with advances and payments received.

Calculate exposure value from aperture, shutter speed, and ISO. Free exposure triangle (ev) calculator for camera exposure, lens settings, and print sizing.

Calculate near/far depth of field from focal length, aperture, and subject distance. Free depth of field calculator for camera exposure, lens settings.

Calculate hyperfocal distance for maximum depth of field in landscape photography. Free hyperfocal distance calculator for camera exposure, lens settings.

Calculate morning and evening golden hour windows for outdoor photography. Free golden hour timer calculator for camera exposure, lens settings.

Calculate flash guide number or required aperture/distance for proper exposure. Free flash guide number calculator for camera exposure, lens settings.

Convert lens focal length to full-frame equivalent field of view. Free crop factor equivalent calculator for camera exposure, lens settings, and print sizing.

Calculate print resolution from image pixels and desired print size. Free print dpi calculator for camera exposure, lens settings, and print sizing.

Calculate maximum print size at a given DPI from camera megapixels. Free megapixel print size calculator for camera exposure, lens settings, and print sizing.