timecalc

Calculator for converting between units of time as well as some simple arithmetic operations

Capabilities

Arithmetic operations

addition
subtraction

Units

seconds
milliseconds
microseconds
nanoseconds

The different mappings of text to unit can be seen in parse_time_unit in src/parse.rs.

Unit conversions

Units are left-associative so the output will be the same unit as the left-most unit. Output can be explicitly set to a given unit by writing as <time_unit> at the end of an expression.

Resolution is at the nanosecond range and output is floating point. format!()'s default behavior for floating point values works well enough for this use-case.

$ tcalc 1 us - 750 ns
Result: 0.25us

Install locally with cargo

cargo install --path .
# For most environments, installs to ~/.cargo/bin/tcalc

Example usage

Adding two different units of time

$ tcalc 2000us + 1000ns
Result: 2001us

Change unit of output

$ tcalc 2000ms - 150ms as us
Result: 1850000us

Expressions with more than two operands and fractions

$ tcalc 1sec - 0.5sec + 250ms
Result: 0.75sec