# Science / Engineering Calculations

Instacalc loves science. It supports most imperial and SI units.

## Scientific Calculator

- Note: Degrees are default: specify radians directly:
`sin(2pi rad)`

## Scientific Units

Instacalc works with most SI units, and you can do comparison as seen above.

- Units can be treated as variables:
`cm`

is`1 cm`

, and you can do`15 * cm`

- Merge base units to compound with
`to SI`

:`15 kg m/s^2 to SI => 15 newton`

- Split compound into base units
`to SIBase`

:`15 N to SIBase => 15 kg m/s^2`

- Make compound units with space or multiplication:
`15 kg m/s^2`

or`15 kg * m/s^2`

- See the predefined constants for physics constants (
`speed of light`

,`gravity`

, etc.)