# Unit Rate Calculator

Enter two quantities and their units of measure to calculate the unit rate.

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## How to Calculate Unit Rate

Unit rate, or just *rate*, is a measure of the quantity of one thing compared to the amount of a different thing. For example, velocity or speed is a rate, which is the change in distance relative to the duration of time.

So, how do you calculate the rate given two different quantities? Start by using the unit rate formula:

rate = quantity 1 quantity 2

Thus rate is equal to the quantity of unit one divided by the quantity of unit 2.

Rate is often expressed as quantity 1 per quantity 2, for example, miles per hour.

Thus, the rate can also be considered to be a fraction that is reduced so that the numerator is an expression over 1. Think of this as the number of miles per 1 hour.

Unit rates are often further simplified and expressed as just the numerator with the first quantity unit over the second. For instance, 25 miles/hour.

Unit price can also be considered a rate of price to the quantity. Try our unit price calculator to learn more.

## Rate Calculation Examples

**For example**, let’s find the rate of speed when you have traveled 100 miles in 4 hours.

rate = 100 miles 4 hours

rate = 25 miles 1 hour

rate = 25 miles/hour (mph)

**For example**, let’s find the rate of an engine that can turn a wheel 2500 revolutions in 10 minutes.

rate = 2500 revolutions 10 minutes

rate = 250 revolutions 1 minute

rate = 250 revolutions/minute (rpm)

**For example**, let’s find the flow rate for 75 gallons of fluid flowed over a 5-minute time period.

rate = 75 gallons 5 minutes

rate = 15 gallons 1 minute

rate = 15 gallons/minute (gpm)