Calculators

8 tools: Mortgage calculator, Paycheck calculator, Tip calculator, Date calculator, Age calculator, BMI calculator, Percentage calculator, Password generator. All tools are free of cost and do not require registration.

You can search by the name of an exam, an identity document or an application form.

Mortgage calculator

The monthly principal and interest on a $320,000 loan at 6.5% for 30 years is $2,022.62. Add property taxes and homeowners insurance (PITI), PMI and HOA dues to see the total monthly payment.

  • Monthly principal and interest, plus taxes, insurance, PMI and HOA dues.
  • Loan terms of 30, 20, 15 or 10 years.
  • Total interest and a yearly amortization schedule.
Calculate mortgage payment

Worked examples

$320,000 loan at 6.5% for 30 years
Principal and interest $2,022.62; total monthly $2,022.62; total interest $408,142.36
$300,000 loan at 6.68% for 15 years
Principal and interest $2,643.10; total monthly $2,643.10; total interest $175,757.86
$320,000 loan at 6.5% for 30 years, with $4,800 property tax and $1,500 insurance a year
Principal and interest $2,022.62; total monthly $2,547.62; total interest $408,142.36

Sources: Consumer Financial Protection BureauChecked: October 2026

Paycheck calculator

For 2026, Social Security is 6.2% of wages up to $184,500 and Medicare is 1.45% of all wages; federal income tax withholding follows IRS Publication 15-T. A single filer paid $2,500 every two weeks takes home $2,092.60.

  • 2026 federal withholding as per IRS Publication 15-T.
  • Social Security 6.2% up to $184,500, Medicare 1.45%.
  • 401(k), Form W-4 Steps 2, 3 and 4(c), and an estimated state tax rate.
Calculate take-home pay

Payroll tax rates for 2026

Social Security
6.2% of wages up to $184,500
Medicare
1.45% of all wages
Additional Medicare Tax
0.9% of wages above $200,000
Federal income tax withholdingAnnual wages minus $12,900 (married filing jointly) or $8,600 (other statuses), then the IRS percentage method table
IRS Publication 15-T

Sources: Internal Revenue ServiceChecked: October 2026

Tip calculator

A 20% tip on an $84.50 bill is $16.90, for a total of $101.40. Choose a tip percentage, split the bill between people, and calculate the tip on the amount before sales tax if you prefer.

  • Tip and total at 15%, 18%, 20%, 22%, 25% or your own percentage.
  • Split the bill evenly between people.
  • Option to tip on the amount before sales tax.
Calculate tip

Tips on a $50.00 bill

15%
$7.50 tip, $57.50 total
18%
$9.00 tip, $59.00 total
20%
$10.00 tip, $60.00 total
22%
$11.00 tip, $61.00 total
25%
$12.50 tip, $62.50 total

These are common percentages, not rules. The amount of a tip is your decision.

Date calculator

Find the number of days between two dates, or the date a given number of days before or after a date. For example, 1 January to 31 December 2026 is 364 days, or 365 days if the end date is included.

  • Days between two dates in days, weeks, and years, months and days. The end date can be included.
  • The number of days from Monday to Friday is also shown.
  • The date a given number of days before or after a date, with the day of the week.
Calculate dates

Worked examples

Number of days in 2026, counting both dates
365 days, of which 261 are Monday to Friday
28 February to 1 March in a leap year
2 days, of which 2 are Monday to Friday
100 days after 26 October 2026
Wednesday, February 3, 2027

Age calculator

Find your exact age in years, months and days on today's date or on a given date. For example, a person born on 15 May 1990 is 36 years, 5 months and 11 days old on 26 October 2026.

  • Exact age in years, months and days from the date of birth.
  • Age as on today's date or on the cut-off date in an exam or job notice.
  • Total days since birth and the date of the next birthday.
Calculate age

Worked examples

Born on 15 May 1990, age on 26 October 2026
36 years, 5 months and 11 days; 13,313 days since birth
Born on 29 February 2000, age on 28 February 2027 (not a leap year)
27 years, 0 months and 0 days; 9,861 days since birth

BMI calculator

For adults 20 and older, the CDC classifies a BMI under 18.5 as underweight, 18.5 to under 25 as healthy weight, 25 to under 30 as overweight, and 30 or higher as obesity.

  • Categories as per the CDC: 18.5, 25 and 30, with three classes of obesity.
  • Shows the healthy weight range for your height.
  • Height in feet and inches or in cm; weight in pounds or kg.
Calculate BMI

Categories as per the CDC adult BMI categories

Underweight
Less than 18.5
Healthy Weight
18.5 to less than 25
Overweight
25 to less than 30
Class 1 Obesity
30 to less than 35
Class 2 Obesity
35 to less than 40
Class 3 Obesity (Severe Obesity)
40 or greater

BMI = weight (kg) ÷ height (m)².

Sources: Centers for Disease Control and PreventionChecked: October 2026

Percentage calculator

Percentage = part ÷ whole × 100. For example, 30 is 25% of 120, and marks of 450 out of 600 are 75%. A change from 48 to 60 is an increase of 25%.

  • A percentage of a number, and what percent one number is of another.
  • Percentage of marks out of a total.
  • Percentage increase or decrease.
Calculate percentage

Worked examples

What is 15% of 80?
15% of 80 is 12.
30 is what percent of 120?
30 is 25% of 120.
Marks of 450 out of 600 as a percentage
450 is 75% of 600.
Change from 48 to 60
From 48 to 60 is an increase of 25%.

Password generator

Generate strong random passwords in your browser. The default is 16 characters with capital and small letters, numbers and special characters, about 102 bits of entropy. You can change the length and the characters, or create a numeric PIN.

  • Generated in your browser; nothing is sent or stored.
  • 4 to 128 characters with the types of characters you choose.
  • Also numeric PINs and Wi-Fi passwords.
Generate a password