Categories
Finance, Building / DIY, School, Dev, and Health. Each list is tools that already exist.
Finance
Loans, pay, pricing, and savings math.
- Finance
Mortgage Refinance Calculator
Compare your current mortgage to a refinance: new payment, interest, and break-even.
Open - Finance
HELOC Calculator
Estimate max line, remaining equity, and HELOC interest or P&I payments.
Open - Finance
Mortgage Payoff Calculator
Add extra monthly or lump-sum payments to see a new payoff date and interest saved.
Open - Finance
Amortization Calculator
Monthly P&I payment plus a year-by-year principal vs interest schedule.
Open - Finance
CD Interest Rate Calculator
Certificate-of-deposit interest calculator with APY/APR and compounding frequency. For people comparing bank CD offers. Not a bank, not tax advice, not a rate lock.
Open - Finance
Personal Loan Calculator
Monthly payment, total interest, and a payoff schedule for unsecured personal loans.
Open - Finance
Student Loan Calculator
Monthly payment, total interest, and payoff date from remaining balance, APR, and term.
Open - Finance
Salary Increase Calculator
See new yearly, monthly, biweekly, and hourly pay after a raise.
Open - Finance
Overtime Calculator
Time-and-a-half, double-time, and weekly gross from hourly rate and overtime hours.
Open - Finance
Markup Calculator
Convert cost and markup into selling price, profit per unit, and gross margin.
Open - Finance
Tip Calculator
Tip amount, total bill, and a per-person split from bill and percent.
Open
Building / DIY
Concrete volume and room area.
School
GPA and percent homework.
Dev
JSON, regular expressions, and barcodes.
Health
Calendar-based cycle timing.