Free Online Calculators – Loan, BMI, ROI, Profit, Tax, Age

💰 Loan Calculator

Calculate your monthly mortgage, personal loan, or auto loan payment instantly.

Loan Amount ($)

Annual Interest Rate (%)

Loan Term (years)

Loan Type

⚠ Please fill all fields with valid values.

Monthly Payment

Total Payment

Total Interest Paid

📈 Profit Calculator

Find your gross profit, net profit, and profit margin in seconds.

Revenue / Selling Price ($)

Cost of Goods Sold ($)

Operating Expenses ($)

Tax Rate (%)

⚠ Please enter valid revenue and cost values.

Gross Profit

Gross Margin

Operating Profit

Net Profit (after tax)

Net Profit Margin

🎯 ROI Calculator

Measure the return on any investment — with annualized ROI included.

Initial Investment ($)

Final Value ($)

Duration (months)

Additional Costs ($)

⚠ Please fill all fields with valid values.

Net Gain / Loss

ROI %

Annualized ROI

⚖️ BMI Calculator

Check your Body Mass Index and healthy weight range — metric or imperial units.

Unit System

Weight (kg)

Height (cm)

Age

Gender

⚠ Please enter valid weight and height values.

Your BMI

🎂 Age Calculator

Find your exact age in years, months, days — and countdown to your next birthday.

Date of Birth

Calculate Age On

⚠ Date of birth must be before the target date.

Age

Total Months

Total Days

Next Birthday In

🧾 Tax Calculator

Estimate your US federal income tax, effective rate, and take-home pay (2024 tax brackets).

Annual Income ($)

Filing Status

Additional Deductions ($)

Tax Credits ($)

⚠ Please enter a valid income amount.

Taxable Income

Estimated Federal Tax

Effective Tax Rate

Take-Home Pay (annual)

Monthly Take-Home

Free OnlineCalculator Tools