About the Rates Calculator
What is this?
A rate is a ratio that compares two quantities with different units — kilometres per hour, words per minute, or cost per unit. Understanding rates helps you compare options, spot the best value, and make sense of everything from phone data plans to electricity tariffs. This calculator converts between different rate units so you can compare like with like.
How it is calculated
To convert a rate, multiply the original value by a conversion factor that relates the two units. For example, to convert 60 km/h to m/s, multiply by 1,000 and divide by 3,600 (since 1 km = 1,000 m and 1 hour = 3,600 seconds), giving 16.67 m/s. The key is to keep track of the units and cancel them correctly.
Reference ranges
Frequently asked questions
How do I compare two rates with different units?
Convert both to the same unit first. For example, convert 30 mph and 50 km/h both to km/h (30 mph ≈ 48 km/h) so you can compare them directly.
What is a unit rate?
A unit rate expresses a quantity per one unit of another measure — for example, 3 dollars per litre or 60 words per minute. Unit rates make comparison straightforward.
Why do rates matter in daily life?
Rates help you evaluate value: cost per gram at the supermarket, fuel efficiency of a car, or the price per gigabyte of a data plan. They turn raw numbers into meaningful comparisons.
Loan & Interest
Calculate loan payments, simple interest, or compound interest. Switch between modes at the top.