Everyday Life calculators
Grades, pets, bills, trips and household math — small questions, exact answers.
GPA Calculator
Grade point average from letter grades and credit hours.
Grade Calculator
The exam score you need to reach your target final grade.
Final Grade Calculator
Your final course grade from a hypothetical exam score.
Weighted Grade Calculator
Weighted average grade from assignments and their weights.
Dog Age Calculator
Your dog's age in human years, adjusted for size.
Cat Age Calculator
Your cat's age in human years.
Electricity Cost Calculator
What an appliance costs to run, per day, month and year.
Fuel Cost Calculator
Fuel needed and trip cost for a drive, US or metric.
Split Bill Calculator
Split a bill with tip and tax evenly between people.
Unit Price Calculator
Compare two products by price per unit and see the saving.
Reading Time Calculator
How long a text takes to read — and to read aloud.
Subnet Calculator
Network, broadcast, usable hosts and masks for an IPv4 CIDR block.
Download Time Calculator
How long a download takes at a given connection speed.
Probability Calculator
Probability as a percentage, decimal and '1 in X' odds.
Rent Affordability Calculator
How much rent you can afford — and the income a rent requires.
Solar Payback Calculator
Solar payback period and 25-year savings with price inflation.
Household Budget Calculator
Split monthly take-home pay with the 50/30/20 rule — or your own.
Emergency Fund Calculator
Your target emergency fund and how long it will take to build.