All Free Calculators
725 free online calculators across 12 categories — math, finance, health, crypto, unit conversion, science, business and daily life tools.
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20 original calculators, 10 private browser tools and 10 decision guides. Free, no account required.
CalcPlanet offers 725 free online calculators covering math, finance, health, crypto, business, science, engineering, construction, statistics, social media, conversion, and daily life. No sign-up, download or payment is required.
Whether you need a mortgage calculator, BMI calculator, percentage calculator, or crypto profit calculator — find the right tool below and get instant, accurate results with documented formulas.
Math Calculators
64- Calculator
- Scientific
- Fractions
- Percentage
- Random Number
- Std Deviation
- Triangle
- Volume
- Area
- Ratio
- Average
- Pythagoras
- Quadratic
- Slope
- Binary
- Hex
- LCM / GCF
- Probability
- Circle
- Trigonometry
- Normal Dist.
- Weighted Avg
- Sig Figs
- Perimeter
- Circumference
- Midpoint
- Acceleration
- Kinetic Energy
- Chi-Square
- Bayes
- Factors
- Decimal ↔ Fraction
- Proportion
- Matrix
- Base Converter
- GCF / GCD
- Exponent Laws
- Mean/Median/Mode
- Number Pattern
- Complex Numbers
- Vectors
- Polynomial Roots
- Series & Sequences
- Arithmetic Sequence
- Geometric Sequence
- Golden Ratio
- Modular Arithmetic
- Prime Check
- Set Theory
- Absolute Value
- Ceiling / Floor
- Factorial
- Fibonacci
- Square Root
- Power (bⁿ)
- % Increase
- Distance
- Angles
- Rounding
- Equation Solver
- Fractions ↔ Decimal
- Cube Root
- LCM / GCD
- Speed / Distance / Time
Financial Calculators
139- Loan
- Compound Interest
- Currency
- VAT
- Tip
- Car Loan
- Retirement
- Investment
- Inflation
- Salary
- What If Invested
- Money Wasted
- Mortgage
- Savings
- Tax
- Discount
- ROI
- Margin
- Sales Tax
- Credit Card
- Simple Interest
- Interest Rate
- Budget
- Payment
- Amortization
- Personal Loan
- Student Loan
- Present Value
- Future Value
- Commission
- Depreciation
- Break-Even
- Markup
- CAGR
- DTI Ratio
- Pension Supplement
- IRA
- RMD
- Bond
- Mutual Fund
- APY
- Payback Period
- WACC
- Hourly → Salary
- Salary → Hourly
- Car Depreciation
- Overtime
- Net Worth
- Savings Goal
- Reverse VAT
- Max Mortgage
- Emergency Fund
- Wealth Tax
- Emergency Fund
- Dividend Yield
- P/E Ratio
- 401(k) Match
- Rental Yield
- Cost Per Use
- LTV Ratio
- Buy vs Rent
- Capital Gains Tax
- Coast FIRE
- Freelance Rate
- SE Tax
- Job Comparison
- Loan Forgiveness
- Tax Bracket
- SWR
- Sinking Fund
- Debt Strategy
- Passive Income
- FI Number
- Mortgage Points
- Closing Costs
- Cap Rate
- Lean FIRE
- Fat FIRE
- Quarterly Tax
- 1099 vs W-2
- Remote Savings
- Raise
- Bonus Tax
- Gig Income
- Wealth by Age
- Affordability
- Inheritance Tax
- Social Security
- Life Insurance
- HELOC
- 529 Plan
- Car Depreciation
- Options Greeks
- Real Return
- DRIP
- Savings Rate
- Rule of 72
- Tax Loss Harvesting
- Annualized Return
- Refinance Break-Even
- Dividend Growth
- Crypto Tax
- Emergency Fund
- Bond Yield
- Index Fund
- Cost of Living
- After-Tax Salary
- Stock Return
- Net Worth
- Buy vs Rent
- Pay Raise
- Monthly Savings
- Loan Comparison
- Currency Exchange
- Net Income
- Coupon Rate
- Price/Sq Ft
- NPV
- Stress Test
- Salary Negotiation
- Wealth Percentile
- Rent Increase
- Tax Bracket
- Loan Payoff
- Net Proceeds
- Paycheck
- Property Tax
- Payroll Tax
- Tax Refund
- Rent Budget
- Take-Home Pay
- Debt Payoff
- Home Affordability
- Rent vs Buy
- Car Lease
- Dividends
- Stock Profit
- APR
- CD
Health & Fitness Calculators
105- BMI
- Calories / BMR
- Body Fat
- Ideal Weight
- Due Date
- BMR
- Macros
- Pregnancy
- Protein
- Pace
- 1 Rep Max
- Heart Rate Zone
- Ovulation
- BAC
- Weight Loss
- Water Intake
- Keto
- Army Body Fat
- Healthy Weight
- Bra Size
- Body Type
- Height Compare
- GFR / Kidney
- TEF
- Calorie Deficit
- Pregnancy Week
- SPF Protection
- Steps → Calories
- Macro Split
- Fiber Intake
- VO2 Max
- Alcohol Calories
- Sleep Debt
- Walking Calories
- Macro Ratio
- Quit Smoking
- IF Calculator
- HR Zones
- Fitness Age
- Hydration
- Macro from Calories
- Waist-Hip Ratio
- Cycling Calories
- Child BMI
- Posture Score
- Life Expectancy
- How Rich Am I
- Calorie Burn
- Macro Goals
- Sleep Quality
- Running Pace
- Step Count
- BMI Imperial
- Alcohol Calories
- Calorie Goal
- Period Tracker
- FFMI
- Biological Age
- Marathon Predictor
- Surplus / Deficit
- Protein Per Meal
- Calories by Activity
- Due Date Countdown
- Detection Times
- Alcohol Detection
- Beer Detection
- Wine Detection
- Spirits Detection
- THC Detection
- Cocaine Detection
- MDMA Detection
- Ketamine Detection
- Benzo Detection
- LSD Detection
- Shroom Detection
- Speed Detection
- Meth Detection
- 3-MMC Detection
- How Long Does Cocaine Stay in Urine?
- How Long Does Cocaine Stay in Blood?
- Cocaine Comedown: Duration & Recovery Timeline
- How Long Does THC Stay in Urine?
- How Long Does THC Stay in Blood?
- How Long Does THC Stay in Saliva?
- THC Detection Time for Frequent & Daily Cannabis Users
- How Long Do THC Edibles Stay in Your System?
- How Long Does MDMA Stay in Urine?
- How Long Does MDMA Stay in Blood?
- MDMA Comedown: Duration & Serotonin Recovery Timeline
- How Long Does Ketamine Stay in Urine?
- Ketamine Detection Time in Saliva Tests
- How Long Does Ketamine Stay in Your System?
- How Long Does Alcohol Stay in Urine?
- How Long Does Alcohol Stay in Blood?
- Alcohol Recovery Timeline: From Hangover to Full Recovery
- How Long Does Beer Stay in Your System?
- How Long Does Amphetamine Stay in Urine?
- Amphetamine Recovery Timeline: Comedown to Full Recovery
- How Long Does Methamphetamine Stay in Urine?
- Methamphetamine Recovery Timeline: From Crash to Healing
- How Long Do Benzodiazepines Stay in Urine?
- Benzodiazepine Withdrawal Timeline & Safety Information
- How Long Does LSD Stay in Your System?
- How Long Does Psilocybin Stay in Your System?
- How Long Does 3-MMC / Mephedrone Stay in Your System?
Everyday Calculators
83- Age
- Date Difference
- Units
- Time
- Grades
- Password
- GPA
- Work Hours
- Sleep
- Dice
- Fuel Cost
- BTU / AC
- Wind Chill
- Day Counter
- Concrete
- Love ❤️
- Final Grade
- Business Days
- Add Days
- Day of Week
- Shoe Size
- Paint
- Bricks
- Sand
- Mulch / Bark
- Download Time
- Recipe Scaler
- Fuel Efficiency
- Tip & Split
- Weight
- Length
- Volume
- Energy Units
- Pressure
- Wind Speed
- Household Budget
- Coffee
- Screen Time
- Vacation Cost
- Wedding Budget
- Moving Cost
- Pet Cost
- Baby Cost
- Grocery Budget
- College ROI
- Holiday Budget
- Commute Cost
- Subscriptions
- Gym vs Home
- Home Office Tax
- Food Waste
- Insurance Savings
- Utility Bill
- Loan Affordability
- Age Difference
- Height Percentile
- IQ Percentile
- Coffee Cost
- Retirement Countdown
- Date Countdown
- Word Count
- Car Payment
- Travel Budget
- Inheritance
- Savings Jar
- House Size
- Phone Upgrade
- Renovation ROI
- Working Days
- Dog Age
- Word Counter
- Subnet
- Aspect Ratio
- Pool Volume
- Typing Test
- Color Converter
- EV vs Gas
- Print Size
- Gas Cost
- Screen Size
- Internet Speed
- Electric Bill
- Electricity Cost
Crypto Calculators
19Statistics Calculators
24Construction Calculators
20Engineering Calculators
21Unit Converters
40- cm → in
- kg → lbs
- °C → °F
- miles → km
- L → gal
- ft → m
- oz → g
- mph → km/h
- ft² → m²
- in → cm
- lbs → kg
- gal → L
- yd → m
- mL → fl oz
- km → miles
- g → oz
- kJ to Calories
- cm to Feet
- kg to Stone
- °F to °C
- ft³ to Gallons
- lbs to oz
- ha to Acres
- Energy Converter
- Pressure Converter
- Data Storage
- Cooking Converter
- Power Converter
- Angle Converter
- Speed Converter
- Temperature
- Weight Converter
- Volume Converter
- Area Converter
- Length Converter
- Time Converter
- Data Transfer
- Watts → Amps
- kWh ↔ Joules
- MPG ↔ L/100km
Business Calculators
51- Amazon FBA
- Shopify Profit
- ROAS
- Etsy Profit
- Dropshipping
- eBay Fees
- eBay Profit
- eBay Store
- eBay Ads
- eBay Break-Even
- Bulk Listing
- eBay Intl Fees
- eBay ROI
- Shipping Impact
- eBay Tax
- Seller Status
- Category Fees
- Monthly Revenue
- eBay vs Others
- Listing Upgrades
- Auction vs BIN
- Refund Fees
- High-Value Fees
- Vehicle Fees
- Tax Summary
- Churn Rate
- MRR/ARR
- Food Cost
- Pricing
- AI API Cost
- SaaS Pricing
- Email ROI
- Inventory Turnover
- CAC
- POD Profit
- Restaurant Profit
- Franchise ROI
- Wholesale Price
- Startup Valuation
- App Revenue
- Break-Even Revenue
- Customer LTV
- Net Margin
- ROI
- CAC & LTV
- Gross Profit
- Profit Margin
- Break-Even Units
- SaaS Revenue
- CPC ROI
- Dropshipping Margin
Science Calculators
24Why Use CalcPlanet?
CalcPlanet is built for speed and accuracy. Every calculator uses documented, industry-standard formulas — the same math used by financial advisors, healthcare professionals, engineers, and educators across the United States and worldwide.
Popular tools include our mortgage payment calculator (used by homebuyers to compare 15-year vs 30-year terms), BMI calculator (WHO-standard body mass index), compound interest calculator (project 401k and IRA growth), and salary calculator (annual to hourly conversion with tax estimates).
Core calculators work instantly and do not require an account. Optional saved results, analytics, ads, API tools or contact features may involve limited technical data as described in the privacy policy.
Social Media Calculators
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