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Every calculation you'll ever need

From quick tip splits to mortgage amortization and statistical analysis β€” DigitalCalculus brings 93+ accurate calculators into one clean, fast, browser-based workspace.

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93+
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Compound Interest
Final value
after 10 years
$19,672
28
Free calculators
40
Pro β€” $5 one-time
25
Expert β€” $10 one-time
100%
Browser-based
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Free calculators open instantly β€” no account needed. Pro & Expert unlock with a one-time license key.
Financial20 calculators
%β†—
Percentage Calculator
X% of Y, percentage change, reverse percent.
Free
πŸ·οΈβ†—
Sales Tax Calculator
Total price with any sales tax rate.
Free
πŸ§Ύβ†—
Tip Calculator
Split bills with custom tip across any group.
Free
πŸ’±β†—
Currency Converter
Convert between 30+ world currencies.
Free
πŸ¦πŸ”’
Loan Calculator
Monthly payment and full amortization table.
Pro
πŸ“ŠπŸ”’
Interest Calculator
Simple vs compound interest comparison.
Pro
πŸ“ˆπŸ”’
Compound Interest
Growth with contributions and compounding.
Pro
πŸ”’πŸ”’
Simple Interest
Principal Γ— rate Γ— time β€” fast and clear.
Pro
πŸ’°πŸ”’
Savings Calculator
Goal planning with monthly contributions.
Pro
πŸ’³πŸ”’
Credit Card Payoff
Time and cost to pay off any card balance.
Pro
πŸš—πŸ”’
Auto Loan Calculator
Monthly car payment with trade-in.
Pro
πŸŽ“πŸ”’
Student Loan
Repayment schedule for student debt.
Pro
πŸ“‹πŸ”’
Budget Calculator
Monthly income vs expenses breakdown.
Pro
πŸ’ΌπŸ”’
Salary / Take-Home Pay
Annual to hourly, before and after-tax.
Pro
πŸ πŸ”’
Mortgage Calculator
Full amortization with overpayment modeling.
Expert
πŸ“…πŸ”’
Amortization Calculator
Month-by-month principal and interest.
Expert
πŸ“‰πŸ”’
Investment Calculator
Portfolio growth with contributions.
Expert
πŸ–οΈπŸ”’
Retirement Calculator
Savings needed for your retirement income.
Expert
πŸ“ŠπŸ”’
Inflation Calculator
Real purchasing power over time.
Expert
πŸ’ΉπŸ”’
ROI Calculator
Return on investment with annualized rate.
Expert
πŸ·οΈβ†—
VAT Calculator
Add or remove VAT at any rate.
Free
πŸ›‘οΈβ†—
Emergency Fund
Exactly how much savings buffer you need.
Free
πŸͺβ†—
Markup Calculator
Cost to price, or find your margin.
Free
πŸ’ŽπŸ”’
Net Worth Calculator
Total assets minus liabilities.
Pro
πŸŽ―πŸ”’
Debt Payoff Calculator
Avalanche vs snowball strategies compared.
Pro
πŸ“ŠπŸ”’
Break-Even Calculator
Units needed to cover fixed and variable costs.
Pro
πŸ“ˆπŸ”’
Profit Margin Calculator
Gross, operating and net profit margins.
Pro
πŸ’°πŸ”’
Paycheck Calculator
US take-home pay after federal and state tax.
Pro
πŸ‘πŸ”’
Home Affordability
Max home price from income and debts.
Pro
πŸ‘€πŸ”’
Employee Cost Calculator
True cost of employment including all taxes.
Pro
πŸ”₯πŸ”’
Burn Rate Calculator
Startup runway and zero-cash date.
Expert
πŸ“‰πŸ”’
CAC & LTV Calculator
Customer acquisition cost and lifetime value.
Expert
βš‘πŸ”’
SaaS Metrics Calculator
MRR, ARR, churn and NRR in one place.
Expert
Health & Fitness21 calculators
βš–οΈβ†—
BMI Calculator
Body mass index with healthy range gauge.
Free
πŸŽ‚β†—
Age Calculator
Exact age in years, months, days.
Free
πŸŽ―β†—
Ideal Weight Calculator
Healthy weight range by height and frame.
Free
πŸ”₯πŸ”’
Calorie Calculator
Daily calorie needs by goal and activity.
Pro
πŸ’€πŸ”’
BMR Calculator
Basal metabolic rate β€” Mifflin-St Jeor.
Pro
πŸ₯—πŸ”’
Macro Calculator
Protein, carb, and fat targets for any goal.
Pro
πŸ“πŸ”’
Body Fat Calculator
Estimate body fat % from measurements.
Pro
βš‘πŸ”’
TDEE Calculator
Total daily energy expenditure.
Pro
β€οΈπŸ”’
Target Heart Rate
5 training zones by age and resting HR.
Pro
πŸƒπŸ”’
Pace Calculator
Running pace, speed, and finish time.
Pro
πŸ’ͺπŸ”’
Lean Body Mass
Lean vs fat mass using multiple formulas.
Expert
πŸ‹οΈπŸ”’
Calories Burned
Calories burned by activity and weight.
Expert
Math24 calculators
πŸ”¬β†—
Scientific Calculator
Full scientific with trig and logs.
Free
Β½β†—
Fraction Calculator
Add, subtract, multiply, divide fractions.
Free
βˆ‘β†—
Average Calculator
Mean, median, min, max from any list.
Free
πŸŽ²β†—
Random Number Generator
Random integers or decimals in any range.
Free
ΟƒπŸ”’
Standard Deviation
Population and sample std dev.
Pro
xΒ²πŸ”’
Quadratic Formula
Solve axΒ²+bx+c=0 with real and complex roots.
Pro
β¬›πŸ”’
Area Calculator
Area of 8 shapes: circle, triangle, rect…
Pro
πŸ“¦πŸ”’
Volume Calculator
Cube, sphere, cylinder, cone and more.
Pro
β–³πŸ”’
Triangle Calculator
Sides, angles, area β€” SSS, SAS, ASA, AAS.
Pro
πŸ“ŠπŸ”’
Statistics Suite
Full descriptive stats with CI.
Expert
πŸŽ―πŸ”’
Probability Calculator
Single and combined event probabilities.
Expert
βŠžπŸ”’
Matrix Calculator
Add, multiply, transpose, determinants.
Expert
πŸ“πŸ”’
Confidence Interval
90%, 95%, 99% confidence intervals.
Expert
ZπŸ”’
Z-Score Calculator
Standardize values and find percentile.
Expert
Other & Tools21 calculators
πŸ“β†—
Unit Converter
Length, weight, temperature, volume, speed.
Free
πŸ“…β†—
Date Calculator
Days between dates, add/subtract days.
Free
⏱️↗
Time Calculator
Add and subtract hours, minutes, seconds.
Free
πŸŽ“β†—
GPA Calculator
Semester and cumulative GPA.
Free
β›½πŸ”’
Fuel Cost Calculator
Trip fuel cost by mpg and gas price.
Pro
πŸ“πŸ”’
Grade Calculator
Weighted final grade from assignments.
Pro
πŸ—οΈπŸ”’
Concrete Calculator
Cubic yards for slabs, columns, steps.
Expert
πŸ πŸ”’
Roofing Calculator
Roofing squares and materials needed.
Expert
βš‘πŸ”’
Electricity Cost
kWh usage and monthly bill estimation.
Expert
Pricing
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Essential calculators for everyday tasks. No sign-up required.
  • 15 calculators
  • Tip & bill splitter
  • BMI & ideal weight
  • Unit & currency converter
  • Scientific calculator
  • Date & time tools
  • Pro calculators
  • Expert calculators
Start free β†’
Most popular
Pro
$5
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Financial and health tools for serious planners.
  • Everything in Free
  • Loan & interest calculators
  • Compound interest
  • Credit card payoff
  • Budget & salary tools
  • Calorie & macro calculator
  • Heart rate zones
  • Standard deviation
Expert
$10
one-time Β· all 55 calculators
Every calculator β€” finance, science, engineering, and statistics.
  • Everything in Pro
  • Mortgage modeler
  • Investment & ROI
  • Retirement calculator
  • Statistics suite
  • Probability & matrix
  • Confidence intervals
  • Concrete & roofing tools

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