SmartToolX
Calculators
Health, finance, and everyday calculators including pregnancy week, due date, target heart rate, sales tax, macros, TDEE, hourly to salary, sleep, protein, ideal weight, mortgage, ROI, inflation, CAGR, period, BMI, EMI, GPA, and FD.
Popular: BMI Calculator, Loan EMI Calculator, TDEE Calculator, ROI Calculator, Percentage Calculator, Age Calculator.
%
Percentage Calculator
Free percentage calculator online. Find X percent of Y.
BMI
BMI Calculator
Check BMI using cm, meters, feet, kg, lb, or stone.
$
Loan EMI Calculator
Free EMI calculator online. Monthly payment for any loan.
Δ
Age Calculator
Free age calculator online. Years, months, and days.
kcal
Calorie Calculator
Daily calories from age, height, weight, and activity. Use cm, feet, kg, lb, or stone.
BMR
BMR Calculator
Resting calories from age, sex, height, and weight. Use cm, feet, kg, lb, or stone.
BF%
Body Fat Calculator
Estimate body fat percentage from BMI, age, and sex.
EDD
Due Date Calculator
Estimated due date from the first day of your last period.
OV
Ovulation Calculator
Fertile window and ovulation day from cycle length.
H2O
Water Intake Calculator
Daily water goal based on body weight.
P
Period Calculator
Next period dates from last period and cycle length.
CI
Compound Interest Calculator
Future value with principal, rate, time, and compounding.
GST
GST Calculator
Free GST calculator online. Add or remove GST or VAT.
tip
Tip Calculator
Tip amount and per-person split for any bill.
−%
Discount Calculator
Sale price and amount saved from a discount percent.
SIP
SIP Calculator
Free SIP calculator online. Estimate monthly SIP maturity.
SI
Simple Interest Calculator
Interest and total payable on a simple-interest loan.
FD
FD Calculator
Fixed deposit maturity from amount, rate, and years.
SLP
Sleep Calculator
Free sleep calculator online. Find bedtime or wake time from 90-minute sleep cycles.
IBW
Ideal Weight Calculator
Free ideal weight calculator online. Devine, Robinson, Hamwi, and Miller formulas plus a healthy BMI range.
MTG
Mortgage Calculator
Free mortgage calculator online. Monthly payment from home price, down payment, rate, and term.
CGR
CAGR Calculator
Free CAGR calculator online. Compound annual growth rate from beginning value, ending value, and years.
PRO
Protein Calculator
Free protein calculator online. Daily protein grams from body weight and goal.
INF
Inflation Calculator
Free inflation calculator online. Future cost and purchasing power from rate and years.
TDEE
TDEE Calculator
Free TDEE calculator online. Total daily energy expenditure from BMR and activity level.
ROI
ROI Calculator
Free ROI calculator online. Return on investment from cost and gain.
MAC
Macro Calculator
Daily protein, carbs, and fat grams from calories and diet style.
$/h
Hourly to Salary Calculator
Convert hourly wage to annual salary, or salary back to hourly.
HR
Target Heart Rate Calculator
Target heart rate zones from age using 220 minus age. Free in your browser.
TAX
Sales Tax Calculator
Add or remove sales tax from a price. Free sales tax calculator online.
40w
Pregnancy Week Calculator
Due date, how many weeks pregnant, and baby growth week by week from your last period.
2D
Date Difference Calculator
Days, weeks, months, and years between two dates.
GPA
GPA Calculator
Free GPA calculator online. GPA from credits, plus CGPA to percentage and back.