Number Real estate investor tools
Cap Rate Calculator
Measure a rental property's return in seconds.
Cash-on-Cash Return Calculator
See what your actual cash invested earns each year.
Mortgage Payment Calculator
Monthly payment, total interest & payoff schedule.
Rental Property Analyzer
Full deal analysis: cash flow, cap rate, CoC return.
ROI Calculator
Measure return on investment & annualized ROI.
Break-Even Calculator
How many units you must sell to break even.
Home Affordability Calculator
Max home price from income, debts & rate.
Debt & money tools
Debt Payoff Calculator
See when you'll be debt-free & interest saved.
Discount Calculator
Sale price, savings & total with tax.
Sales Tax Calculator
Add sales tax to any price instantly.
Hourly to Salary Converter
Convert hourly wage ↔ annual salary.
Car Loan Calculator
Auto payments, total interest & true cost.
Refinance Calculator
Should you refinance? Savings & break-even.
Savings Goal Calculator
Monthly deposits to hit any savings target.
Credit Card Payoff Calculator
Months to debt-free & total interest cost.
Salary Raise Calculator
New salary, raise amount & per-paycheck.
Freelancer tools
Freelance Hourly Rate Calculator
Price your work from your real income goal.
Invoice Generator
Create a clean, printable invoice in a minute.
Compound Interest Calculator
Watch savings and investments grow over time.
Small business tools
Mileage Deduction Calculator
Estimate your IRS mileage deduction for 2026.
Quarterly Tax Estimator
Estimate self-employment quarterly payments.
Business Loan Calculator
Payments, total cost & amortization for business loans.
Everyday tools
Tip Calculator
Split the bill and tip fairly in seconds.
Password Generator
Strong random passwords, generated locally.
Word Counter
Count words, characters & reading time instantly.
GPA Calculator
Compute your grade point average from courses.
Age Calculator
Exact age, days lived & next birthday countdown.
Unit Price Calculator
Compare products by price per oz, lb & more.
BMI Calculator
Body mass index, imperial & metric.
Time Duration Calculator
Hours between times; add & subtract durations.
Home & DIY tools
Paint Coverage Calculator
How many gallons for your room & coats.
Deck Material Estimator
Boards, screws & concrete for your deck.
Moving Cost Estimator
Compare movers vs DIY truck rental.
Why free?
Every tool runs entirely in your browser — your numbers never leave your device. If a tool saves you real money, check out our premium spreadsheet packs on Gumroad for deeper planning.