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Instant, visual tools for every math problem — from your mortgage to your restaurant bill. Results update as you type.

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Mortgage · Live Calculator
Adjust sliders below
Loan Amount
Total Interest
Payoff Year
Rate
6.50%
Home Price$350,000
Interest Rate6.50%
Loan Term30 years
Adjust the sliders to see your mortgage payment.
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Finance & Loans
🏠
Mortgage Calculator
Monthly payment + amortization
💳
Loan Calculator
Car, personal, student loans
📈
Compound Interest
Investment growth over time
🏦
Savings Calculator
Reach your savings goal
💰
Credit Card Payoff
Debt-free date + interest saved
🎯
Retirement Calculator
Are you on track?
💼
Salary Calculator
Hourly ↔ annual conversion
🚗
Auto Loan
Car payment with trade-in
Everyday Math
%
Percentage Calculator
5 types of percent problems
🍽️
Tip Calculator
Tip + bill split instantly
🏷️
Discount Calculator
Sale price after any % off
📋
Sales Tax Calculator
Add or strip tax from any price
〰️
Average Calculator
Mean, median, mode
⚖️
Ratio Calculator
Simplify and solve ratios
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Health & Body
⚖️
BMI Calculator
Body mass index + healthy range
🔥
Calorie Calculator
Daily calorie needs (TDEE)
🤱
Pregnancy Due Date
Due date from last period
🥗
Macro Calculator
Protein, carbs, fat targets
💪
Ideal Weight
Healthy weight for your height
📅
Ovulation Calculator
Fertile window from cycle
Date & Time
🎂
Age Calculator
Exact age in years, months, days
📆
Date Difference
Days between two dates
⏱️
Countdown Timer
Days until any date
🌍
Time Zone Converter
Convert times worldwide
School & Student
🎓
GPA Calculator
Weighted + unweighted GPA
📝
Grade Calculator
What do I need on my final?
🎒
Student Loan
Monthly payment after grad
Test Grade
Score from right/wrong answers
Business & Real Estate
📊
Profit Margin
Gross and net margin %
Hourly Rate
Freelance rate from salary goal
🔨
ARV Calculator
After-repair value for flips
📬
Rental Yield
Gross + net rental return %
Why people use MathlyPro
Most calculator sites feel like 2008. We built something you'd actually want to use.
Results as you type
No button to click. Numbers update the instant you touch any slider.
📊
Visual breakdowns
Charts that show exactly where your money goes.
💬
Plain English
We translate results into clear explanations you can act on.
🔒
100% private
All calculations in your browser. We never see your data.
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