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Converters · Formula sheet

Converters formulas

One printable sheet for 18 Converters tools — formulas collected from each calculator’s How it works.

Converters calculators →

Angle Converter

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\[ \pi\ \mathrm{rad}=180^\circ \]

Enter Mode 0–3 and Value for the Angle Converter; use only the listed mode or unit codes. The calculator reports Converted: Mode: 0 deg→rad, 1 rad→deg, 2 deg→grad, 3 grad→deg. Select the documented mode and unit codes; rounding may affect the last displayed digits.

Area Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

Base Converter

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\[ n = \sum d_i b^{i} \]

Parse the input in the source base to get an integer, then rewrite it in the target base.

Data Storage Converter

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\[ 1\,\mathrm{KiB}=1024\,\mathrm{B} \]

Enter Value, From unit 0–4, and To unit 0–4 for the Data Storage Converter; use only the listed mode or unit codes. The calculator reports Converted: from/to: 0=B,1=KiB,2=MiB,3=GiB,4=TiB. Select the documented mode and unit codes; rounding may affect the last displayed digits.

Download Speed Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

Energy Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

Force Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

Fuel Economy Converter

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\[ L/100\mathrm{km}=235.215/\mathrm{mpg} \]

Enter Mode (0=mpg→L/100,1=reverse) and Value for the Fuel Economy Converter; use only the listed mode or unit codes. The calculator reports Converted: Fuel economy unit conversion using 235.215 factor. Select the documented mode and unit codes; rounding may affect the last displayed digits.

Length Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

Megabytes Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

Power Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

Pressure Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

Roman Numerals Converter

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\[ 1994 = MCMXCIV \]

Greedy mapping from largest symbol to smallest builds the Roman form; the reverse sums signed place values.

Temperature Converter

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\[ ^{\circ}\!F = ^{\circ}\!C \times \tfrac{9}{5} + 32 \]

Convert through Celsius as an intermediate scale.

\[ K = ^{\circ}\!C + 273.15 \]

Kelvin is Celsius shifted by absolute zero.

Time Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

Velocity Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

Volume Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

Weight Converter

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\[ x_{\text{to}} = x_{\text{from}} \times \frac{f_{\text{from}}}{f_{\text{to}}} \]

Scale to the base unit, then to the target unit.

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