Margins, markups, and the arithmetic of a sale. Business numbers worked out in full.
Calculate gross profit margin from cost and selling price, or price for a target margin.
Find selling price from cost plus markup, or markup percentage from cost and price.
Find the sale price and amount saved from an original price and a discount percentage.
Work out the tip and total from a bill amount and tip percentage, split across any number of people.
Add sales tax to a price, or find the pre-tax price and tax amount from a total.
Project the future value of a balance with compound interest, with the growth shown step by step.
Calculate simple interest and the final balance using I = P · r · t.
Calculate commission earned from a sale amount and commission rate.
Find return on investment as a percentage from the gain and the cost of an investment.
Work out overtime pay at 1.5× the hourly rate, plus total pay for the week.
Find the units and revenue you need to cover fixed and variable costs and start turning a profit.
Turn a loan amount, rate, and term into a monthly payment and a full payment-by-payment principal and interest schedule.
See how extra monthly payments move up your payoff date and how much interest they save.
Find the maturity value and interest on a certificate of deposit, or solve back for the APY, deposit, or term you need.
Find marginal cost, marginal revenue, and marginal profit from two points or a production table, and the output where MR = MC.
Calculate your home equity loan payment, or solve back for the most you can borrow at your lender.
Convert an hourly rate to an annual salary, or run it backwards from salary to hourly.
Calculate your new salary after a raise, work out the raise percentage from old and new pay, or solve for the raise needed to hit a target.
Calculate a personal loan payment, the cash left after the origination fee, and the effective APR the fee hides.
Calculate a car payment with sales tax, fees, down payment and trade-in — or work backwards from a monthly budget to the price it buys.
Calculate the interest-only HELOC payment during the draw period and the amortizing payment after it — or solve back for the credit line your equity supports.
Calculate overtime pay at time and a half or double time, under the weekly 40-hour rule or a daily rule, with a blended rate for two pay rates.
Project a PTO balance forward to any date.
Calculate an SBA 7(a) payment from prime plus your lender spread, the upfront guarantee fee, and a 10- or 25-year term.
Calculate the full monthly mortgage payment — principal, interest, property tax, insurance and PMI — with the amortization schedule and PMI drop-off.
Compare your new mortgage payment against the old one, find the break-even month on the closing costs, and see the lifetime savings.
Compare the debt snowball and avalanche methods across all your debts — the payoff date, total interest, and interest saved.
Work out how much house you can afford from your income, debts and down payment using the 28/36 DTI rule.
Calculate a student loan payment, total interest, and payoff time, with interest capitalization and the effect of paying extra.
Find how long it takes to pay off a credit card at a set payment, or the payment needed to be debt-free by a date, with total interest.
Find the true APR of a loan once fees and points are folded in, so you can compare offers on one comparable annual rate.
Compare two loans side by side on monthly payment, lifetime interest, total cost with fees, and effective APR to find the cheaper one.
Calculate the monthly cost of private mortgage insurance and the month it drops off when the balance reaches 80% and 78% of the price.
Estimate mortgage closing costs line by line — lender fees, third-party services and prepaids — plus the total cash you need to close.
Calculate your front-end and back-end debt-to-income ratio, check it against the 28/36 rule and 43% mortgage limit, and see your debt room.
Calculate your down payment from a home price and percent, or work backwards from savings — with the loan amount, the 20% PMI line and the cash to close.
Compare your debts against one consolidation loan — the new monthly payment, total interest and fees, payoff time, and the money saved or lost.
Project your retirement nest egg from your age, savings and monthly contribution — with the split between contributions and growth, and the cost of starting late.
Find how much to save each month to hit a goal, how long a fixed deposit takes, or where your savings will land — with interest compounded monthly.
Project the future value of a lump sum plus monthly contributions — the growth versus principal split, the return multiple, and a growth lookup chart.
Calculate your net worth from assets minus liabilities, with the split, your debt-to-asset ratio, and a comparison to US net worth by age.
Project a Roth IRA's tax-free balance at retirement from your age, contributions and return, and the tax you save versus a taxable account.
Compare the true cost of renting versus buying over the years you stay — net of the down payment invested, appreciation, and buying and selling costs.
See how paying half your mortgage every two weeks cuts interest and shortens the loan, versus the standard monthly schedule.
See how much cash you can pull from your home and the new payment, with the loan-to-value and the most you can borrow at the 80% cap.
Compare your student loans against a refinanced loan — the new payment, total interest, and the savings, weighed against lost federal protections.
Estimate the funds a HECM reverse mortgage could provide from your age and home value, less costs and any mortgage payoff.
Calculate an RV or boat loan payment with tax, fees, down payment and trade-in, plus total interest and total cost over the long terms these loans use.