Stats Calculator Online
Finance Calculators
Loans, interest, ROI, tips, taxes, and time value of money. Free tools on Stats Calculator Online with formulas, how-to steps, similar calculator widgets, tidbits, and exportable reports.
- Loan Payment CalculatorMonthly payment, total interest, and payoff totals
- Mortgage Payment CalculatorHome loan payment from price, down payment, and rate
- EMI Calculator CalculatorEquated monthly installment for a loan
- Simple Interest CalculatorInterest = principal × rate × time
- Compound Interest CalculatorFuture value with periodic compounding
- CAGR Calculator CalculatorCompound annual growth rate
- ROI Calculator CalculatorReturn on investment percentage
- Tip Calculator CalculatorTip amount and per-person split
- Discount Calculator CalculatorSale price after a percent off
- Markup Calculator CalculatorSelling price from cost and markup %
- Profit Margin CalculatorMargin from cost and selling price
- Sales Tax CalculatorTax amount and total with tax
- Reverse Sales Tax CalculatorBack out pre-tax amount from a total
- Rule of 72 CalculatorYears to double an investment
- Future Value CalculatorFV of principal plus optional deposits
- Present Value CalculatorDiscount a future amount to today
- Net Present Value CalculatorNPV of a cash-flow series
- Salary to Hourly CalculatorConvert annual salary to hourly wage
- Hourly to Salary CalculatorConvert hourly wage to annual salary
- Inflation Calculator CalculatorFuture cost under constant inflation
- Effective Annual Rate CalculatorConvert nominal APR to EAR
- Amortization Schedule CalculatorPayment breakdown and loan schedule preview
- Straight-Line Depreciation CalculatorAnnual depreciation expense
- Declining Balance Depreciation CalculatorYear-by-year declining-balance schedule
- Car Affordability CalculatorLoan amount from a target monthly payment
- House Affordability CalculatorHome price estimate from income and debts
- Gas Mileage CalculatorMPG and cost per mile
Tidbits from Stats Calculator Online
Plan ahead
Power before you collect data
Fix the smallest meaningful effect and α, then compute sample size. Inflate n for dropout when recruiting humans.
Sample size calculator →Everyday math
Percent change ≠ percent of
Percent of is part÷whole. Percent change uses the starting value in the denominator—and +50% then −50% does not return to start.
Percentage calculators →Quick tip
Sample vs population SD
Use n−1 (sample) when your data are a subset of a larger group; use n when you truly have the whole population.
Open SD calculator →
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Cross-topic picks from Stats Calculator Online
- One-Sample t-Test CalculatorHypothesis Testing · Test a sample mean against a hypothesized value
- Mean, Median, Mode CalculatorDescriptive Statistics · Calculate arithmetic mean, median, and mode
- Normal Distribution CalculatorProbability Distributions · PDF, CDF, and quantiles of the normal
- Simple Linear Regression CalculatorRegression Analysis · Fit y = a + bx with inference
- Chi-Square Independence CalculatorHypothesis Testing · Test association in contingency tables
- Sample Size & Power CalculatorHypothesis Testing · Plan sample size for desired power