Finance Calculators

Simple Interest Calculator

Calculate simple interest on loans and investments. Shows total amount, daily, and monthly interest breakdown.

Compound Interest Calculator

Calculate compound interest with all compounding frequencies. Includes contributions, APY, and year-by-year growth table.

APR to APY Calculator

Convert a nominal APR to its effective APY (or back) for any compounding frequency — daily, monthly, quarterly, semi-annually, annually, or continuous. Free, instant.

Rule of 72 Calculator

See how many years it takes to double your money at a given rate using the Rule of 72 shortcut, plus the exact compound-interest doubling time. Free, instant, reverse mode included.

Rental Yield Calculator

Calculate gross and net rental yield from a property's purchase price, rent, and operating costs. Includes price-to-rent ratio and payback period. Free, instant.

Percentage Calculator

Calculate percentages in 4 modes: X% of Y, X is what % of Y, percentage change, and percentage difference.

Discount Calculator

Calculate sale price after discount. Find discount amount, final price, and savings instantly. Supports any percentage.

Unit Price Calculator

Calculate price per oz, lb, g, kg, liter, or item and compare up to 4 products side-by-side to find the best value. Free grocery price comparison tool.

Tip Calculator

Calculate tip amount and split the bill among multiple people. Supports custom tip percentages and any number of guests.

Restaurant Tip Pool & Tip-Out Calculator

Split a pooled tip total among staff by hours worked or shift points, or calculate server tip-out percentages owed to bartenders, bussers, and hosts.

Payment Processing Fee Calculator

Calculate the fee PayPal, Stripe, Square, or a custom processor deducts from a payment, and your net payout. Reverse mode solves what to charge to net a target amount.

EV Charging Cost & Range Calculator

Calculate EV charging cost from battery size, electricity rate, and charging loss, plus range added, charging time, and a cost-per-mile comparison against gas. Free, instant.

Car CO2 Emissions & Carbon Footprint Calculator

Calculate how much CO2 your car produces from trip distance, fuel economy, and fuel type (gasoline, diesel, hybrid, or EV). See total emissions, per-mile rate, and how it compares to average.

Cost Per Wear Calculator

Calculate an item's cost per wear from its price and how many times you've worn it, with an instant value rating. Compare up to 3 items side-by-side. Free, client-side.

PTO Accrual & Vacation Balance Calculator

Calculate your accrued PTO or vacation balance from your annual allotment, accrual frequency, start date, and days used — with policy cap support. Free, client-side.

Gratuity Calculator

Calculate gratuity payout under the Payment of Gratuity Act 1972. Shows tax exemption up to ₹20 lakh and eligibility check.

Overtime Pay Calculator

Calculate overtime pay from your hourly rate and hours worked. Supports standard weekly 1.5x overtime and California-style daily double-time rules.

Recurring Deposit Calculator

Calculate RD maturity amount with quarterly compounding. Month-by-month breakdown showing exact interest earned each quarter.

Savings Goal Calculator

Find out how much you need to save each month to reach a savings goal, or how long it will take at a fixed contribution. Includes interest. Free, instant.

Credit Card Validator

Check if a card number passes the Luhn checksum, identify its network (Visa, Mastercard, Amex, Discover & more), and generate Luhn-valid test numbers for QA.

Lottery / Powerball & Mega Millions Tax Calculator

Enter a jackpot and pick your state to see estimated federal + state tax withheld and actual take-home winnings for both the annuity and cash (lump sum) options. Free, instant.