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New: wargaming scales from 54mm (1:32) to 3mm (1:600), plus fleet scales down to 1:3000. New: scales of your own. Save a scale you use often under a name of your choice, say "Garden railway 1:22.5", and pick it from the scale list with one tap. The free version keeps three; the Pro version has no limit.
Convert a length through a drawing or map scale, or work out the scale itself.
Scale Calculator converts lengths through the scale of a drawing, plan or map. Who this app is for • Model builders and wargamers: railways (H0, N, TT, Z, OO), plastic kits, figures, 3D printing • Architects, builders and students working from drawings and printouts • Hikers, landowners and anyone measuring distances on a map What it does • Converts a real length into the length on a map or model, and back • Works out the scale from the two lengths given • Comes with 57 common scales, each under its own name: models 1:1 to 1:700 (H0, N, TT, Z, OO, S, O), wargaming by figure size from 54mm to 3mm (28mm · 1:56, 15mm · 1:100, 6mm · 1:285 and 1:300), architecture 1:20 to 1:500 along with the inch scales (1/4″ = 1′, 1/8″ = 1′) and maps 1:1,000 to 1:1,000,000, including the 1:24,000 USGS sheet • Keeps a list of the scales used most recently • Saves your own scales under names you choose, such as 1:22.5 for a garden railway • Remembers the last settings, so nothing has to be typed in again after a restart • Shows the scale three ways: 0.02, 2% of full size, or 1 cm = 250 m • Calculates in millimetres, centimetres, metres, kilometres, inches, feet, yards, miles and nautical miles • Converts areas and volumes as well, including hectares, acres, litres and millilitres • Suggests the standard scale for fitting a drawing onto a sheet, from A4 to A0 and from Letter to ARCH E • Copies the result or passes it on to another app • Keeps a list of named dimensions and converts them all at the scale that is set • Shares the list as text or saves it as a CSV file • Turns the screen into a scale ruler, graduated at true size and in real distances • Calibrates the ruler against a bank card What the Pro version adds (one-time purchase) • Lifts the limit of three dimensions on the list • Lifts the limit of three saved scales • Removes the ads Interface in English, German, Spanish, French and Polish. More scale tools: https://calculatescale.com