Mortgage, loans, interest, investments, retirement, and more
Monthly payments, total interest, and amortization schedule
Simple interest I = P × r × t — no compounding
See how your money grows with compound interest
Model portfolio growth with regular contributions
Calculate loan payments and total cost of borrowing
Calculate monthly car payments and total cost
How much to save each month to reach your goal
Estimate how much you need for retirement
Calculate tip and split bills among friends
Calculate sale prices and savings
Convert between world currencies (offline rates)
See how inflation affects purchasing power over time
Track your assets and liabilities
Plan your debt repayment strategy
Return on investment, gain/loss, and CAGR
Units needed to cover your fixed costs
How long to double your money
How long until an investment pays for itself
Calculate tax amounts ex/incl. VAT
Convert pay between hourly, weekly, monthly, and annual
See your new salary and per-period difference after a raise
Regular pay, overtime pay, and effective hourly rate
Compound Annual Growth Rate and year-by-year projection
Grow a lump sum or regular contributions over time
Discount future cash flows or annuities to today's value
Net Present Value and IRR for investment cash flows
Internal Rate of Return with cumulative cash flow table
Selling price, gross profit, margin %, and markup %
Full amortization schedule with monthly payment breakdown
Convert APR to APY across compounding frequencies
Max rent based on income using the 28%, 30%, and 36% rules
Average cost per share across multiple purchase lots
Markup %, profit margin, and target price from cost
Add or remove sales tax with quick-reference rate table
Weighted Average Cost of Capital with formula breakdown
Project your 401(k) balance at retirement including employer matching
Project your Roth IRA balance with tax-free growth
Calculate earnings on a Certificate of Deposit
Plan a staggered CD strategy for regular liquidity
Compare refinancing options and find your break-even point
Estimate the max home price you can afford using 28/36 rule
See how your home equity grows over time
Calculate your HELOC line, draw-period payments, and repayment schedule
Compare cost of living between US cities and find equivalent salary
See how long to pay off your credit card and total interest paid
Compare your current card vs a low-APR transfer offer
Track per-card and overall utilization — keep under 30%
Estimate monthly payments and total interest across repayment plans
Monthly payments, total interest, and amortization for business loans
Monthly payments and total cost for an unsecured personal loan
Monthly boat loan payments from amount, rate, and term
VA home-loan payment including optional funding fee
Borrowing against gold weight, purity, price, and LTV
Payments on a raw-land or lot loan
Commercial real estate or business-purpose loan payments
Compare current auto payment vs a refinance and break-even
Illustrative HECM principal limit from home value and age
IO payment then fully amortizing principal-and-interest
Loan rate plus fees converted to APR
Front-end and back-end DTI vs 28/36/43% caps
Monthly payout from a lump sum or PV of an annuity
Clean price and current yield from coupon and YTM
Purchase or refinance closing costs as % plus itemized fees
Down payment dollars, loan amount, and PMI flag
Loan-to-value and equity from loan and property value
Maximum loan from income, debts, DTI cap, rate, and term
NOI ÷ value and gross yield from rent and expenses
Straight-line or double-declining-balance schedule
Monthly income minus envelopes vs a savings-rate goal
FI number from spend and SWR, then years to get there
IRR for irregular dated cash flows
Gain or loss from buy, sell, shares, and commissions
Pro-rate an annual salary for a partial period
Time value of money: solve for N, I/Y, PV, PMT, or FV