Free Online Calculators, Converters & Tools
Accurate, private, and always free. Every calculation runs in your browser — no sign-ups, no data collection.
Popular Calculators
Age Calculator
Determine age in years, months, weeks, and days. Leap years and month lengths handled. Total months, weeks, days, hours, minutes, seconds.
Auto Lease Calculator
Expose the money factor, true APR, and total cost of ownership for your vehicle lease.
Average Calculator
Calculate mean, median, mode, range, and geometric mean with real-time statistics from raw datasets.
Bandwidth Calculator
Compute download times, hosting bandwidth needs, and understand bits vs bytes.
Basic Calculator
Premium basic calculator with history, memory, PEMDAS, and keyboard shortcuts. 100% accessible.
Big Number Calculator
Arbitrary precision calculator for numbers with 1,000+ digits. Handle factorials, large exponents, and decimals with full accuracy. No rounding errors, no limits.
Binary Calculator
Binary calculator with bitwise operations (AND, OR, XOR, NOT, NAND), bit shifting, 2's complement, and real-time decimal/hex/octal conversions. Perfect for computer science and digital logic.
BMI Calculator
Calculate your Body Mass Index based on height and weight.
Calorie Calculator
Calculate daily calorie needs using Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle formulas. Get TDEE, target intake for weight loss/gain, macro splits, and zig-zag calorie cycling schedules.
Compound Interest Calculator
Calculate compound interest with multiple frequencies. See real wealth growth adjusted for inflation.
Concrete Calculator
Estimate bags of concrete and cubic yards needed for slabs, footings, columns, stairs, and curbs. Includes waste factor adjustments and weight calculations.
Future Value Calculator
Calculate nominal and inflation-adjusted future value with tax projections. See real purchasing power over time.
Gravel Calculator
Free gravel calculator with material density presets, compaction buffer, and cost estimation. Supports rectangular, circular, and triangular areas.
HELOC Calculator
Calculate HELOC payments for draw and repayment periods. Model 2026 LTV limits, variable rate spikes, and interest-only costs.
Home Equity Loan Calculator
Calculate fixed monthly payments for a home equity loan. Compare 2026 CLTV limits, total interest costs, and tax-deductibility for home improvements.
House Affordability Calculator
Calculate exactly how much house you can afford using 2026 lender standards. Factor in DTI ratios, property taxes, and the 2026 mortgage stress test.
Income Tax Calculator
Calculate your 2026 federal income tax liability. Includes 2026 brackets, new senior deductions, FICA taxes, and tax refund estimation.
Inflation Calculator
Calculate the real value of your money. Compare 1913โ2026 historical CPI data or project future purchasing power with our strategic inflation tool.
Interest Calculator
Calculate compound interest with 2026 strategy. Adjust for inflation, taxes, and fees to see your true real rate of return.
Interest Rate Calculator
Find the hidden interest rate on any loan or investment. Calculate implied APR from payments and terms with our 2026 diagnostic tool.
IP Subnet Calculator
Calculate IP ranges, subnet masks, and usable hosts. Visual binary breakdown and cheat sheet.
IRA Calculator
Calculate your 2026 IRA contributions and growth. Compare Roth vs. Traditional, model 2026 SECURE 2.0 catch-ups, and check phase-out limits.
Keto Calculator
Calculate personalized ketogenic macros for nutritional ketosis.
Loan Calculator
All-in-one debt management engine. Calculate payments for standard, deferred, and bond-style loans. Model extra payments, compare APR vs APY, and accelerate payoff.
Marriage Tax Calculator
Compare Married Filing Jointly vs. Single status using 2026 tax brackets. Discover if your marriage will result in a tax bonus or a penalty.
Mortgage Calculator
Advanced P&I breakdown including PMI, taxes, and risk sensitivity analysis.
Mulch Calculator
Premium landscape estimator for mulch and soil. Calculate cubic yards, bags, and cost with instant visual feedback.
Percentage Calculator
Quickly solve percentage-based math problems.
Profit Margin Calculator
Calculate profit margins, markup, and selling prices from any two inputs. Compare gross vs net profit with operating expenses. Free 2026 business profitability calculator.
Rent vs. Buy Calculator
Compare long-term costs of renting vs. buying.
Repayment Calculator
Calculate loan payoff timeline and total interest. Compare fixed term vs fixed payment strategies with 2026 interest rate benchmarks.
Scientific Calculator
Free online scientific calculator with trig (sin, cos, tan), logs, powers, ฯ and e. Deg/Rad toggle. Unit Circle visualizer.