Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

River Gradient Calculator

Calculate the steepness of a river or stream in metres per kilometre. Essential for hydrologists, geographers, and kayakers assessing flow energy and erosion potential.

Elevation Drop (m)

River Length (m)

Fill in the required fields to see your result.

Geography

Timezone Offset Calculator

Convert a time from one timezone to another given the UTC offsets of both. The simplest case of timezone arithmetic — useful for cross-time-zone meetings, travel planning, and reading wall-clock times across regions.

Origin Timezone Offset (hours)

Destination Timezone Offset (hours)

Time (24h format) (hours)

Fill in the required fields to see your result.

Key differences

	River Gradient Calculator	Timezone Offset Calculator
Category	Geography	Geography
Inputs required	2	3
Result	River Gradient (m/km)	Converted Time (hours)
What it does	Calculate the steepness of a river or stream in metres per kilometre. Essential for hydrologists, geographers, and kayakers assessing flow energy and erosion potential.	Convert a time from one timezone to another given the UTC offsets of both. The simplest case of timezone arithmetic — useful for cross-time-zone meetings, travel planning, and reading wall-clock times across regions.