🧮 Everyday Calculators
Quick calculators for everyday math — percentages, tips, dates, finance, and health. No sign-up, no ads (when disabled), all free.
All Calculators
Percentage Calculator
X% of Y, what % is X of Y, and percentage change.
🍽️Tip Calculator
Calculate tip and split the bill for any party size.
🎂Age Calculator
Exact age in years, months, days from date of birth.
📅Date Difference
Days, weeks, and months between two dates.
📈Compound Interest
Investment growth over time with compound interest.
⚖️BMI Calculator
Body Mass Index in metric or imperial units.
🏷️Unit Price Calculator
Compare price-per-unit to find the better deal.
🛍️Discount Calculator
Sale price after percent off, including stacked discounts.
🎓GPA Calculator
Semester and cumulative GPA on the 4.0 scale.
📝Final Grade Calculator
The score you need on the final to hit your target.
📐Square Footage Calculator
Room area with waste allowance and flooring cost.
🎨Paint Calculator
Gallons of paint needed for any room and coat count.
🧱Concrete Calculator
Cubic yards and premix bags for slabs and footings.
🪞Tile Calculator
Tiles and boxes needed from room and tile size.
🌳Mulch Calculator
Cubic yards and bags of mulch from bed size and depth.
🪨Gravel Calculator
Cubic yards and tons of gravel, stone, or topsoil.
🏛️Roman Numeral Converter
Numbers to Roman numerals and back, 1–3999.
🔤Number to Words
Spell out numbers, including check-writing format.
💻Number Base Converter
Decimal, binary, hex, and octal in one tool.
🖼️Aspect Ratio Calculator
Find any ratio or solve the missing dimension.
🥶Wind Chill Calculator
Feels-like temperature from cold and wind (NWS formula).
🥵Heat Index Calculator
Feels-like temperature from heat and humidity.