Free Online Calculators
Grade, health, finance & math calculators that answer your questions in seconds. No sign-up, no downloads.
456 Free Calculators
Quick Calculate — try it right now
% of
✓456 Free Calculators
✓7 Categories
✓No Signup
✓100% Free
✓Mobile Friendly
Our Calculators
456 calculators
College Admission CalculatorEstimate your admission chances from GPA and test scores.Use Calculator →
Final Grade CalculatorWhat do you need on your final exam to reach your target grade?Use Calculator →
Middle School GPA CalculatorSemester and cumulative GPA with autosave, built for middle school.Use Calculator →
UT GPA CalculatorGPA on the official University of Texas grading scale.Use Calculator →
UT Austin GPA CalculatorOfficial UT Austin plus/minus scale, verified against the catalog.Use Calculator →
Semester GPA CalculatorCalculate your semester GPA on the 4.0 scale.Use Calculator →
High School GPA CalculatorWeighted and unweighted high school GPA.Use Calculator →
College GPA CalculatorCollege GPA on the 4.0 scale.Use Calculator →
CGPA to Percentage ConverterConvert CGPA to percentage instantly.Use Calculator →
Letter Grade to GPA ConverterConvert letter grades to GPA.Use Calculator →
ASU Cumulative GPA CalculatorArizona State University GPA.Use Calculator →
14 Out of 20 Grade14/20 = 70% (C) — percentage, letter grade, decimal & fraction.Use Calculator →
15 Out of 20 as a Percentage15/20 = 75% (C). Instant conversion with full breakdown.Use Calculator →
15 Out of 20 Grade15/20 = 75% (C) — grade guide with GPA notes.Use Calculator →
16 Out of 20 Calculator16/20 = 80% = 0.8 = 4/5 (B). Math + grade answers together.Use Calculator →
What Is a 16 Out of 20?80% (B) explained in depth — GPA cautions & international notes.Use Calculator →
20 Out of 25 as a Percentage20/25 = 80% (B) — three solution methods included.Use Calculator →
11 Out of 15 Grade11/15 = 73.33% (C) — one question away from a B.Use Calculator →
13 Out of 15 Grade13/15 = 86.67% (B) — knocking on B+’s door.Use Calculator →
10 Out of 15 Grade10/15 = 66.67% (D) — plus the one-question path to a C.Use Calculator →
30 of 2000 as a Percentage30/2000 = 1.5%. Percentage math on a bigger scale.Use Calculator →
20/30 Grade20 out of 30 as percentage and grade.Use Calculator →
HCPSS Grade CalculatorHoward County school grades.Use Calculator →
BMI CalculatorCheck your Body Mass Index.Use Calculator →
BMR CalculatorYour basal metabolic rate.Use Calculator →
Body Fat Percentage CalculatorEstimate body fat %.Use Calculator →
TDEE CalculatorTotal daily energy expenditure.Use Calculator →
Daily Calorie Needs CalculatorYour daily calorie target.Use Calculator →
Daily Water Intake CalculatorHow much water per day.Use Calculator →
Ideal Body Weight CalculatorYour ideal weight range.Use Calculator →
Target Heart Rate Zone CalculatorFind your training zones.Use Calculator →
Body Recomposition CalculatorLean mass, calories & protein targetsUse Calculator →
Breastfeeding Calorie CalculatorDaily calories while nursingUse Calculator →
Calories for Men CalculatorBMR and calorie targets for menUse Calculator →
Steps to Calories CalculatorConvert steps to calories burnedUse Calculator →
Kilojoules to CaloriesConvert kJ to kcal instantlyUse Calculator →
Calories Burned CalculatorCalories burned by activity, weight, and time.Use Calculator →
Sleep CalculatorBest bedtimes and wake times by sleep cycle.Use Calculator →
Macro CalculatorDaily protein, carb, and fat targets.Use Calculator →
Pregnancy Due Date CalculatorEstimate your due date from your last period.Use Calculator →
One Rep Max CalculatorEstimate your 1RM from any lift.Use Calculator →
Bra Size CalculatorFind your correct bra size from band and bust measurements.Use Calculator →
Body Shape Calculatorbody shape calculator: enter bust, waist and hip measurements to discover yUse Calculator →
EER CalculatorEER calculator using Institute of Medicine equations: get your estimated enUse Calculator →
Height Calculatorheight calculator: predict a child’s adult height from parents’ heights usiUse Calculator →
Lean Body Mass Calculatorlean body mass calculator: estimate LBM with the Boer, James and Hume formuUse Calculator →
Protein Calculatorprotein calculator: get your daily protein target in grams from weight, actUse Calculator →
Shoe Size Calculatorshoe size calculator: measure your foot and get US, UK and EU sizes for menUse Calculator →
Mortgage CalculatorEstimate monthly mortgage payment.Use Calculator →
Compound Interest CalculatorWatch your money grow.Use Calculator →
Tip CalculatorSplit the bill fairly.Use Calculator →
Loan Payment CalculatorMonthly loan payments.Use Calculator →
Savings Goal CalculatorReach your savings target.Use Calculator →
Salary to Hourly Wage ConverterConvert salary to hourly pay.Use Calculator →
Reverse Sales Tax CalculatorFind the pre-tax price from the totalUse Calculator →
Credit Card Payoff CalculatorSee your debt-free date and interestUse Calculator →
Retirement Savings CalculatorHow long will your savings last?Use Calculator →
Simple Interest CalculatorCalculate simple interest earningsUse Calculator →
APY CalculatorFind the true annual yieldUse Calculator →
Sales Tax CalculatorSales tax and total price, instantly.Use Calculator →
CAGR CalculatorCompound annual growth rate for investments.Use Calculator →
Rent vs Buy CalculatorCompare the true cost of renting vs buying.Use Calculator →
Home Affordability CalculatorHow much house can you afford?Use Calculator →
Overtime CalculatorRegular + overtime pay at 1.5x or 2x rates.Use Calculator →
Wage Conversion CalculatorConvert salary to hourly pay and more.Use Calculator →
Fuel Cost CalculatorTrip fuel cost from distance, MPG, and price.Use Calculator →
CPM CalculatorCost per mille — ad campaign cost efficiency.Use Calculator →
Dividend CalculatorDividend income, yield, and DRIP growth projections.Use Calculator →
Cap Rate CalculatorCapitalization rate for rental property investments.Use Calculator →
Mileage Reimbursement CalculatorIRS mileage deduction and reimbursement totals.Use Calculator →
Customer Acquisition Cost CalculatorCAC and LTV:CAC ratio for your marketing spend.Use Calculator →
Break Even CalculatorUnits and revenue needed to break even.Use Calculator →
Earnest Money CalculatorGood-faith deposit and cash needed at closing.Use Calculator →
HHI CalculatorHerfindahl-Hirschman Index for market concentration.Use Calculator →
Car Affordability Calculatorcar affordability calculator: enter income, debts, down payment and loan teUse Calculator →
Car Depreciation Calculatorcar depreciation calculator: project your vehicle’s value year by year withUse Calculator →
Cash Conversion Cycle Calculatorcash conversion cycle calculator: enter revenue, COGS, inventory and receivUse Calculator →
CD CalculatorCD calculator: project certificate of deposit growth with any compounding fUse Calculator →
Commission Calculatorcommission calculator: flat-rate or tiered sales commission plus base salarUse Calculator →
Current Ratio Calculatorcurrent ratio calculator: divide current assets by current liabilities, getUse Calculator →
Deadweight Loss Calculatordeadweight loss calculator: enter prices and quantities before and after aUse Calculator →
Discounted Cash Flow (DCF) CalculatorDCF calculator: project growing cash flows, discount them to present value,Use Calculator →
EPS CalculatorEPS calculator: enter net income, preferred dividends and shares outstandinUse Calculator →
EBITDA CalculatorEBITDA calculator: compute EBITDA from net income or revenue, get EBITDA maUse Calculator →
EVA CalculatorEVA calculator: enter NOPAT, invested capital and WACC to see if a companyUse Calculator →
Enterprise Value Calculatorenterprise value calculator: enter market cap, debt and cash to get EV plusUse Calculator →
EOQ CalculatorEOQ calculator: enter annual demand, ordering and holding costs to get theUse Calculator →
Expected Return Calculatorexpected return calculator: CAPM mode (risk-free rate, beta, market return)Use Calculator →
Fisher Equation CalculatorFisher equation calculator: solve for real rate, nominal rate or inflationUse Calculator →
Future Value Calculatorfuture value calculator: grow a lump sum plus monthly contributions with coUse Calculator →
Inventory Turnover Calculatorinventory turnover calculator: enter COGS and inventory values to get turnoUse Calculator →
Margin Calculatormargin calculator: profit margin, markup, and target pricing in one tool. SUse Calculator →
ROI CalculatorROI calculator: total return, annualized ROI, net profit and money multipleUse Calculator →
ROIC CalculatorROIC calculator: NOPAT divided by invested capital. See how efficiently a cUse Calculator →
Electricity Cost Calculatorelectricity cost calculator: enter any appliance’s wattage, daily hours andUse Calculator →
Percentage CalculatorFast percentage calculations.Use Calculator →
Fraction to Decimal CalculatorConvert fractions to decimals.Use Calculator →
Discount CalculatorSale prices and savings.Use Calculator →
Average CalculatorMean, median and mode.Use Calculator →
Ratio Simplifier CalculatorSimplify any ratio.Use Calculator →
Standard Deviation CalculatorMeasure data spread.Use Calculator →
Exponential Growth CalculatorGrowth, decay & doubling timeUse Calculator →
Percentage Change CalculatorPercent increase or decreaseUse Calculator →
Decimal to Fraction CalculatorConvert decimals to fractionsUse Calculator →
Polynomial Multiplication CalculatorMultiply polynomials step by stepUse Calculator →
Roman Numerals ConverterNumbers to Roman numeralsUse Calculator →
Age CalculatorCalculate age from birthdate.Use Calculator →
Date CalculatorDays between dates, or add/subtract days.Use Calculator →
Quadratic Formula CalculatorSolve ax²+bx+c=0 with steps shown.Use Calculator →
GCF CalculatorGreatest common factor + LCM, step by step.Use Calculator →
Z Score CalculatorStandard scores and probabilities for any value.Use Calculator →
Percent Error CalculatorAccuracy of experimental vs accepted values.Use Calculator →
Chi Square CalculatorChi-square test for categorical data.Use Calculator →
Relative Risk CalculatorRisk ratios from 2×2 contingency tables.Use Calculator →
Thermal Expansion CalculatorMaterial expansion from temperature change.Use Calculator →
Fibonacci CalculatorFibonacci calculator: find any term F(n) up to n=1000 exactly, see the fullUse Calculator →
Square Root Calculatorsquare root calculator: instant √x with perfect-square detection, Newton-RaUse Calculator →
Random Number Generatorrandom number generator: set a range, draw up to 500 numbers, allow or blocUse Calculator →
Time Calculatortime calculator: add or subtract time durations in hours, minutes and seconUse Calculator →
Cubic Yard CalculatorCalculate cubic yards of concrete, soil, mulch, or gravel for any project.Use Calculator →
Concrete Block CalculatorEstimate concrete blocks, mortar, and sand for your wall project.Use Calculator →
Pea Gravel CalculatorFind how much pea gravel you need by area and depth.Use Calculator →
River Rock CalculatorEstimate river rock coverage for landscaping beds and paths.Use Calculator →
CMU Block CalculatorCalculate CMU blocks, mortar, and cost for any wall.Use Calculator →
Wall Stud CalculatorCount studs, plates, and fasteners for framing a wall.Use Calculator →
Yards to Tons ConverterConvert cubic yards to tons for gravel, mulch, soil, and more.Use Calculator →
Concrete Weight CalculatorFind the weight of concrete by volume, bags, or slab size.Use Calculator →
Mulch CalculatorCalculate cubic yards, bags, and cost of mulch for beds.Use Calculator →
Gravel CalculatorEstimate cubic yards, tons, and cost of gravel by type.Use Calculator →
Tile CalculatorCount tiles, boxes, and grout for floors and walls.Use Calculator →
Fence CalculatorEstimate posts, pickets, rails, and concrete for a wood fence.Use Calculator →
Deck Board CalculatorCalculate deck boards, board feet, and screws for any deck.Use Calculator →
Sod CalculatorFind sod rolls, pallets, and cost for your new lawn.Use Calculator →
Square Footage CalculatorArea of rooms, lots, and irregular shapes.Use Calculator →
Flow Rate CalculatorPipe flow rate, velocity, and volume.Use Calculator →
Volume of a Cube Calculatorvolume of a cube calculator: enter one side length to get volume, surface aUse Calculator →
Paint Calculatorpaint calculator: enter room size, doors, windows and coats to find gallonsUse Calculator →
Metric Calculatormetric calculator: convert length, mass, volume, temperature, area and speeUse Calculator →
Metal Weight Calculatormetal weight calculator for plate, round/square bar and pipe. 6 metals, metUse Calculator →
Study Guides
- How to Convert a Fraction to a Percentage in 3 Steps
- What Is a Good GPA in Middle School?
- How to Find the Percentage of Any Number
Why Use Our Calculators?
- ✓Instant answers — type your numbers, hit Calculate, done. No sign-up.
- ✓Works everywhere — phone, tablet, or desktop.
- ✓Free forever — every calculator and every guide.