All calculators
Every calculator in one place
Use this page as the fastest path to the exact calculator you need. Browse by category, jump into a guide, or open a calculator directly.
Financial
Financial calculators
Loans, mortgages, taxes, and money decisions without the fog.
Mortgage Calculator
Monthly payment, interest split, and payoff horizon.
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Loan Calculator
Estimate payments for personal or business loans.
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Compound Interest Calculator
Project growth with compounding and contributions.
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Savings Calculator
Plan targets with regular deposits.
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Income Tax Calculator
Estimate take-home with quick assumptions.
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Simple Interest Calculator
Estimate non-compounded interest and final balance.
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Discount Calculator
Work out sale price, savings, and final checkout total.
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Sales Tax Calculator
Estimate tax amount, before-tax price, and final total.
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Break-Even Calculator
Estimate units and revenue needed to cover fixed costs.
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ROI Calculator
Measure return on investment, profit, and margin.
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Commission Calculator
Estimate commission, total pay, and effective rate.
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Hourly to Salary Calculator
Convert hourly pay into weekly, monthly, and annual income.
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Salary to Hourly Calculator
Convert annual salary into hourly and weekly pay.
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Payback Period Calculator
Estimate how long it takes an investment to recover itself.
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Debt to Income Calculator
Check front-end and back-end debt-to-income ratios.
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Gross Margin Calculator
Estimate revenue, gross profit, and gross margin from unit economics.
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Markup Calculator
Estimate selling price, gross profit, and margin from cost plus markup.
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Mortgage Points Calculator
Estimate upfront points cost, annual savings, and breakeven time.
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Auto Loan Calculator
Estimate monthly payments and total cost for a vehicle loan.
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Retirement Calculator
Project retirement savings based on contributions and growth.
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Amortization Calculator
See how each payment splits between principal and interest.
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Investment Calculator
Project investment growth with regular contributions.
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Inflation Calculator
See how purchasing power changes over time.
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Credit Card Payoff Calculator
Find out how long to pay off a credit card balance.
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Debt Payoff Calculator
Plan a timeline to eliminate outstanding debt.
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Student Loan Calculator
Estimate student loan payments and total repayment cost.
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Budget Calculator
Split income into needs, wants, and savings.
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APR Calculator
Convert nominal rate and fees into annual percentage rate.
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VAT Calculator
Calculate value-added tax and gross or net price.
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Take-Home Pay Calculator
Estimate net pay after taxes and deductions.
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CD Calculator
Project returns on a certificate of deposit.
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Future Value Calculator
Project the future value of a lump sum with growth.
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Present Value Calculator
Find today's value of a future sum.
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Rent Calculator
Estimate affordable rent based on income.
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House Affordability Calculator
Estimate how much house you can afford.
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Refinance Calculator
Compare current vs refinanced loan to see savings.
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Currency Converter
Convert between currencies with a custom rate.
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Fitness & Health
Fitness & Health calculators
Body metrics, energy needs, and simple health baselines.
BMI Calculator
Body mass index with quick category feedback.
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Calorie Calculator
Daily calorie needs based on activity.
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BMR Calculator
Basal metabolic rate estimate.
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Body Fat Calculator
Estimate body fat percentage from key measurements.
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Protein Intake Calculator
Estimate daily protein needs and per-meal targets.
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Water Intake Calculator
Estimate baseline hydration and workout-related water needs.
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Target Heart Rate Calculator
Estimate max heart rate, reserve, and target training pulse.
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One Rep Max Calculator
Estimate one-rep max and a practical training max.
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Pace Calculator
Estimate pace, speed, and projected race time.
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Waist to Height Ratio Calculator
Check waist-to-height ratio and baseline waist threshold.
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Macro Calculator
Estimate protein, fat, and carbs from calories and macro split.
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Lean Body Mass Calculator
Estimate lean mass, fat mass, and target weight from body fat.
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Ideal Weight Calculator
Estimate ideal body weight based on height and frame.
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TDEE Calculator
Estimate total daily energy expenditure based on activity.
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Calories Burned Calculator
Estimate calories burned during exercise.
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Pregnancy Due Date Calculator
Estimate the expected due date from the last period.
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Carbohydrate Calculator
Estimate daily carb needs based on calorie target.
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Sleep Calculator
Find optimal bedtime and wake time by sleep cycles.
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Fat Intake Calculator
Estimate daily fat needs based on calorie target.
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Healthy Weight Calculator
Find the healthy weight range for your height.
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Math
Math calculators
Everyday math, geometry, and core scientific tools.
Scientific Calculator
Advanced functions in a clean layout.
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Percentage Calculator
Percent change, increase, and share.
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Fraction Calculator
Add, subtract, multiply, and divide fractions.
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Triangle Calculator
Solve triangles with sides and angles.
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Average Calculator
Find the mean and the score needed to hit a target average.
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Ratio Split Calculator
Split any total into two ratio-based parts.
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Circle Calculator
Calculate circumference, area, and a sector area.
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Rectangle Calculator
Calculate area, perimeter, and material cost for a rectangle.
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Cylinder Volume Calculator
Calculate cylinder volume, lateral area, and filled volume.
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Slope Calculator
Calculate slope percent, angle, and line length.
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Distance Between Points Calculator
Find delta x, delta y, and straight-line distance.
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Proportion Calculator
Solve a missing value in a simple proportion.
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Sphere Calculator
Estimate diameter, surface area, and volume from radius.
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Cone Volume Calculator
Estimate cone volume, filled volume, and slant height.
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Standard Deviation Calculator
Calculate mean, variance, and standard deviation from values.
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Probability Calculator
Calculate basic probability of single and combined events.
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Quadratic Formula Calculator
Solve ax² + bx + c = 0 using the quadratic formula.
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Pythagorean Theorem Calculator
Find the missing side of a right triangle.
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GCF Calculator
Find the greatest common factor of two numbers.
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LCM Calculator
Find the least common multiple of two numbers.
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Exponent Calculator
Calculate powers, roots, and exponential values.
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Logarithm Calculator
Calculate logarithms in any base.
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Binary Calculator
Convert between decimal and binary numbers.
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Mean Median Mode Calculator
Calculate central tendency measures from data values.
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Other
Other calculators
Time, dates, and practical utilities you use weekly.
Age Calculator
Exact age in years, months, and days.
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Date Calculator
Add or subtract days between dates.
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Fuel Cost Calculator
Estimate fuel needed, trip cost, and cost per mile.
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Work Hours Calculator
Estimate paid hours, regular hours, and overtime from a shift.
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Time Calculator
Add or subtract hours, minutes, and seconds.
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Hours Calculator
Calculate the difference between start and end times.
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GPA Calculator
Calculate grade point average from course grades.
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Grade Calculator
Calculate weighted average grade from assignments.
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Tip Calculator
Calculate tip amount and split the bill among friends.
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Speed Calculator
Calculate speed, distance, or time from two known values.
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Time Duration Calculator
Calculate the duration between two dates in various units.
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Density Calculator
Calculate density, mass, or volume from two known values.
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Crypto
Crypto calculators
Trading clarity, fees, and position planning.
Crypto Profit/Loss Calculator
Measure profit after fees and price moves.
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Crypto DCA Calculator
Average your entry price over time.
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Crypto Fee Impact Calculator
Understand how fees change breakeven.
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Crypto Position Size Calculator
Estimate units and position value from account risk.
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Crypto Staking Yield Calculator
Estimate simple rewards and a compounded staking balance.
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Crypto Risk Reward Calculator
Estimate downside, upside, and risk-reward ratio from a trade plan.
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AI
AI calculators
Costs, usage, and planning for modern AI work.
AI Token Cost Calculator
Estimate cost by tokens and model tier.
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AI Model Cost Comparator
Compare providers by workload and cost.
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AI Image Cost Calculator
Estimate monthly and annual image generation cost.
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AI Fine-Tune Budget Calculator
Estimate token volume and training budget for fine-tuning.
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AI Batch Savings Calculator
Estimate labor and budget saved through AI automation.
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AI Inference Budget Calculator
Estimate monthly and annual inference spend from token usage.
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AI Chatbot Cost Calculator
Estimate chatbot spend from conversations, messages, and unit cost.
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AI Automation ROI Calculator
Estimate monthly savings, net gain, and annual ROI from automation.
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