Math tools
Math Calculators
Use free calculators for percentages, discounts, averages, geometry, pricing, and other everyday formulas.
Practical Calculators With Visible Assumptions
These calculators are built for everyday planning and learning: percentages, pricing, geometry, finance, construction, beverage volume, and other common formulas.
Results are intended as helpful estimates. For important decisions, check the formula, verify the inputs, and confirm with a qualified professional when needed.
Everyday Math
Quick calculators for percentages, pricing, averages, and number formats.
Percentage Calculator
Calculate what a percentage of a number is for discounts, tips, taxes, grades, and everyday math.
Percentage Increase Calculator
Calculate the percentage increase from an original value to a new value.
Discount Calculator
Calculate the final price after a percentage discount for shopping, sales, and promotions.
Average Calculator
Calculate the average of a list of numbers for grades, scores, budgets, and data checks.
Tip Calculator
Calculate a tip amount and total bill for restaurants, delivery, rides, and services.
Unit Price Calculator
Calculate price per unit to compare groceries, products, packages, and bulk purchases.
Markup Calculator
Calculate selling price from cost and markup percentage for pricing products or services.
Margin Calculator
Calculate profit margin percentage from cost and selling price.
Fraction to Decimal Calculator
Convert a fraction to a decimal for homework, measurements, recipes, and everyday math.
Decimal to Percentage Calculator
Convert decimals to percentages for math, grades, rates, ratios, and everyday calculations.
Geometry
Formula calculators for common geometry and measurement problems.
Circle Area Calculator
Calculate the area of a circle from its radius for geometry, schoolwork, and measurements.
Rectangle Area Calculator
Calculate rectangle area from length and width for rooms, layouts, schoolwork, and projects.
Triangle Area Calculator
Calculate triangle area from base and height for geometry, schoolwork, and practical measurements.
Square Root Calculator
Calculate the square root of a number for homework, geometry, estimates, and quick math checks.
Beverage Volume
Serving-size math for pegs, shots, bottles, and common drink measurements.
Peg to ML Calculator
Convert small pegs, large pegs, shots, wine pours, and bottles into milliliters.
Alcohol Serving Calculator
Estimate beverage serving volume, total milliliters, and bottles needed.
Cups to ML Converter
Convert cups to milliliters for kitchen and beverage measurements.
ML to Cups Converter
Convert milliliters to cups for recipes and drink measurements.
Construction
Home improvement calculators for material coverage, depth, volume, and project planning.
Cubic Yards to Square Feet Calculator
Estimate coverage area from cubic yards and depth.
Square Feet to Cubic Yards Calculator
Estimate material volume from area and depth.
Concrete Calculator
Calculate cubic yards from length, width, slab thickness, and extra allowance.
Mulch Calculator
Estimate mulch cubic yards, cubic feet, and bag count.
Gravel Calculator
Estimate gravel cubic yards, cubic feet, and bag count.
Topsoil Calculator
Estimate topsoil cubic yards, cubic feet, and bag count.
Sand Calculator
Estimate sand cubic yards and bag count.
Compost Calculator
Estimate compost cubic yards and bag count.
Construction Calculators
Browse construction and home improvement calculators.
Finance
Planning tools for loans, home payments, and everyday financial estimates.
Mortgage Calculator
Estimate monthly mortgage payments with principal, interest, property tax, insurance, HOA, and PMI.
Loan Calculator
Estimate fixed-rate loan payments, total interest, and total repayment cost.
Compound Interest Calculator
Estimate future value, total contributions, and interest earned over time.
All Finance Calculators
Browse finance tools for mortgage payments, APR, and borrowing estimates.