Calculators
Browse our collection of free online calculators for health & fitness, finance & money, everyday life, and industry niches.
Finance & Money
Overtime pay, bill splitting, budgeting, and other financial calculators.
Health & Fitness
Body composition, hydration, calories, and fitness metrics.
Everyday Life
Age, percentage, inches to feet, date difference tools, and more.
Industry Niches
Specialized calculators for construction, brewing, agriculture, and other trades. Coming soon.
All Calculators
Overtime Pay Calculator
Finance & Payroll
Calculate overtime pay beyond your normal working hours.
Split Bills Fairly Calculator
Finance & Group Utilities
Quickly and fairly figure out how much each person owes for group expenses.
Tip Calculator
Finance & Money
Calculate your tip, split the bill, and round to a clean total.
Sales Tax Calculator
Finance & Money
Add tax, reverse a total, or find the rate. All 50 state rates included.
Rent Affordability Calculator
Finance & Money
How much rent you can afford by salary, with full expense breakdown.
Take-Home Pay Calculator
Finance & Money
Net pay after federal, FICA, and state taxes for 2026.
Age Calculator
Everyday Life
Exact age + zodiac, generation, birthstone, and birthday countdown.
Percentage Increase Calculator
Everyday Life
Three modes for finding %, applying %, or reversing %. Plus salary and price tables.
Inches to Feet Calculator
Everyday Life
Convert with feet-and-inches output, plus a complete height chart.
Liters to Gallons Calculator
Everyday Life
Two-way converter with reference charts and common volume benchmarks.
Salary to Hourly Calculator
Finance & Money
All 7 pay period equivalents at once. Plus a "true hourly rate" breakdown.
Water Intake Calculator
Health & Fitness
Personalized daily target with a drinking schedule, not just a number.
Body Fat Percentage Calculator
Health & Fitness
US Navy or BMI method. Includes lean body mass and goal weight.