Free Online Calculators
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Popular Calculators
Mortgage Calculator — Monthly Payment with Taxes & PMI
Free mortgage calculator: estimate your monthly P&I, taxes,…
Salary Calculator — Hourly, Monthly & Pay Period Converter
Free salary calculator: convert annual pay to hourly, weekly…
BMI Calculator — Body Mass Index for Adults
Free adult BMI calculator. Enter height in cm or inches and…
Percentage Calculator — Find P% of X & Percent Change
Free percentage calculator for the three common questions: w…
Age Calculator — Exact Age in Years, Months & Days
Free age calculator: find your exact age in years, months, a…
Loan Calculator — Monthly Payment & Total Interest
Free loan calculator: estimate monthly payment, total intere…
Tip Calculator — Tip Amount & Bill Split
Free tip calculator: compute the tip amount, total bill, and…
GPA Calculator — Weighted Grade Point Average on 4.0 Scale
Free weighted college GPA calculator. Enter grade points (A=…
Fraction Calculator — Add, Subtract, Multiply & Divide
Free online fraction calculator: add, subtract, multiply, di…
Grade Calculator — Weighted Class Grade & Final Exam Needed
Weighted grade calculator: find your current class grade fro…
Body Fat Calculator — US Navy Tape-Measure Method
Free body fat calculator using the US Navy tape-measure meth…
Hours to Minutes Calculator: Fast h to min Conversion
Free hours to minutes calculator: convert h to min instantly…
Sales Tax Calculator — Add or Remove Tax from a Price
Free sales tax calculator: add tax to a price or reverse-cal…
Net Pay Calculator — Take-Home Salary After Taxes
Free net pay calculator: estimate your annual take-home sala…
Overtime Calculator — Hourly & Time-and-a-Half Pay
Free overtime calculator: split weekly hours into regular (u…
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Recently Added
Wedding Reception Cost Calculator — Full Budget Breakdown
Wedding Photographer Cost Calculator — Price Breakdown
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Wedding Guest Count Calculator — Expected Attendees
Wedding Florist Cost Calculator: Estimate Flower Budget
Wedding DJ Cost Calculator — Price Breakdown
Wedding Alcohol Calculator — Drinks & Bar Cost
Road Trip Cost Calculator: Gas, Hotel & Food Budget
Disney World Cost Calculator: Trip Price Estimate
Airline Baggage Fee Calculator: Checked & Oversize Costs
About Smekys
Smekys is a free library of online calculators covering personal finance, health, math, home improvement, automotive, education, travel and everyday life. Every calculator runs instantly in your browser — results update as you type, with nothing to install or sign up for. Your inputs never leave your device, and results are shown as plain, easy-to-read numbers.