Unit Tracks Calculator

A full scientific calculator with a running tape, plus scientific-notation, sig-fig rounding, chemistry constants and a cylinder solver that shows every step.

Tape

Results you commit with = show up here. Click an expression to load it again, or a result to insert it.

Scientific notation and sig figs

Type any number in any form. Add a sig-fig count to round it.

Number Round to sig figs

Decimal: –
Scientific: –
Calculator form: –
Sig figs as typed: –

Counting rules: leading zeros never count, trailing zeros count only with a decimal point, and 120. has one more sig fig than 120.

Constants

Use inserts the value into the calculator.

Name	Value	Unit

Cylinder: volume, diameter and length

Pick the one to find and fill in the other two, each with its unit. The steps show the algebra, the unit conversions, the arithmetic and the sig figs. Use in calculator puts the unrounded answer into the calculator.