All Calculators

Perform basic arithmetic operations.

Calculate percentages, percentage change, and ratios.

Generate random integers with options for uniqueness and sorting.

Check if a number is prime.

Calculate powers and roots of numbers.

Simplify ratios to their lowest terms.

Add, subtract, multiply, and divide fractions with step-by-step solutions.

Calculate statistical measures of central tendency.

Calculate population and sample standard deviation.

Find terms in arithmetic and geometric sequences.

Find greatest common factor and least common multiple of two or more numbers.

Solve quadratic equations using the quadratic formula with real and complex roots.

Calculate the factorial of any non-negative integer (n!).

Calculate sale price, discount amount, and original price from percentage off.

Convert between profit margin and markup and compute selling price from cost.

Round numbers to a given decimal place or significant figures.

Paste a list of options and let the picker choose one (or many) at random.

Calculate loan payments, interest and schedule.

Calculate compound interest with multiple frequencies and detailed projections.

Systematic Investment Plan calculator with step-up and wealth projections.

Calculate Return on Investment with comprehensive metrics and analysis.

Plan your Financial Independence (FIRE) date using savings rate, spending, and withdrawal assumptions.

Calculate Equated Monthly Installments with amortization schedule.

Multi-purpose interest calculator for simple, compound, rate, and time calculations.

Generate detailed loan amortization schedule with payment dates and cumulative totals.

Calculate total monthly mortgage payment including Principal, Interest, Taxes, and Insurance.

Compare current mortgage with refinanced loan to determine savings and break-even point.

Calculate how a lump sum payment can reduce monthly payment or loan term through recasting.

Convert annual salary to hourly wage and vice versa.

Split income into needs, wants, and savings using the 50/30/20 rule.

Calculate tip amount and split the bill by person.

See how many years your portfolio will last at your planned withdrawal rate — and whether you're on track.

Find out how much you need saved today so compound growth alone carries you to retirement — no more contributions needed.

Test how long your portfolio survives at 3–5% withdrawal rates across bear, base, and bull market scenarios.

Project how much passive dividend income your portfolio generates — monthly, annually, and 20 years from now.

Calculate premium income, annualised yield, and max profit from selling covered calls on your stock positions.

Project how your net worth compounds and track when you'll hit $100K, $500K, $1M and beyond.

See exactly how much a 1% fee difference silently drains from your portfolio over 10, 20, and 30 years.

Determine whether a Roth or Traditional IRA wins for your tax situation with a side-by-side after-tax comparison.

Compare guaranteed interest savings from paying off debt against expected investment returns to make the optimal choice.

Calculate your Body Mass Index with WHO classification and health recommendations.

Calculate BMR, TDEE, and daily calorie needs with macronutrient breakdown.

Calculate Total Daily Energy Expenditure for cutting, bulking, or maintenance.

Calculate ideal body weight using Robinson, Devine, Hamwi, and Miller formulas.

Calculate body fat percentage using the US Navy Method.

Predict your next period, ovulation day, and fertile window using your average cycle length.

Calculate your due date using LMP, conception date, or IVF transfer date.

Estimate daily water intake based on weight, activity, and climate.

Plan wake and bed times around 90-minute sleep cycles for better rest.

Calculate running or walking pace (min/mile, min/km) from time and distance.

Calculate gross profit margin, markup, and selling price from cost.

Generate a professional, ready-to-send response to any Google review in seconds.

Calculate interest owed on overdue invoices and generate a follow-up email.

Find out how many sales you need to cover costs and start making profit.

Check domain availability and social handle options for your business name.

Calculate the minimum hourly rate you need to charge to hit your income goals.

See how many months of runway you have before you run out of cash.

Calculate how much a customer is worth over their entire relationship with your business.

See the real salary cost of a meeting — add attendees and find out if it was worth it.

Calculate Return on Ad Spend, cost per acquisition, and revenue needed to break even on ads.

Find out how many extra units you need to sell to maintain profit after giving a discount.

Calculate the real annual cost of a hire — salary plus taxes, benefits, and overhead.