Calculators A to Z

Every calculator card in the cabinet, by first letter. Filter a letter to find one fast.

R 14 calculators

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Calculator	Drawer	Example result
Raised to Power e Calculator: Calculate e^x	Numbers and Powers	2.718282
Rate per 100 Calculator: Formula and Examples	Work and Ops Metrics	4.00 per 100
Rational and Irrational Numbers Calculator: How It Works	Numbers and Powers	1 1 or 0
Rational Numbers and Decimals Calculator: Convert and Compare	Numbers and Powers	0.750000
Reach Calculation Formula for Social Media	Work and Ops Metrics	5,000 people
Reaction Rate Law Calculator with Rate Constant	Lab Science	0.1250 mol/(L s)
Rocker Arm Calculator: Ratio, Lift, and Valve Motion	Engines and Motion	1.50 ratio
Roll Length Calculator by Weight: Formula and Examples	Work and Ops Metrics	100.00 m
Roll Length Calculator Formula and Worked Example	Work and Ops Metrics	661.49 m
Roll Outer Diameter Calculator and Formula	Work and Ops Metrics	364.83 mm
Rolled Material Length Calculator and Formula	Work and Ops Metrics	661.49 m
Rowing Power-to-Weight Calculator and What It Means	Engines and Motion	2.67 W/kg
Run Walk Bike Mileage Calculator: Compare Distances	Cycling and Outdoors	15.00 mi
Running Feet to Meters: Convert Distance and Track Units	Unit Conversions	1,609.34 m