Free Online Calculators & Converters
Fast, accurate, and completely free. No signup required. Just pick a tool and get your answer instantly.
Popular Tools
Unit Converters
View all →Inches to CM Converter
Convert inches to centimeters and centimeters to inches instantly.
Feet to Meters Converter
Convert feet to meters and meters to feet with precision.
Pounds to KG Converter
Convert pounds (lbs) to kilograms (kg) and vice versa.
Cups to ML Converter
Convert cups to milliliters for cooking and baking recipes.
Fahrenheit to Celsius
Convert temperatures between Fahrenheit and Celsius scales.
Finance & Percentage Calculators
View all →Percentage Calculator
Calculate percentages: what is X% of Y, percentage increase/decrease, and more.
Tip Calculator
Calculate tips for restaurants, delivery, and services. Split bills easily.
Discount Calculator
Calculate sale prices and savings from percentage discounts.
Profit Margin Calculator
Calculate profit margin, markup, and cost from revenue and costs.
Date & Time Tools
View all →Age Calculator
Calculate your exact age in years, months, and days from your birthday.
Days Between Dates
Calculate the number of days, weeks, and months between two dates.
Business Days Calculator
Calculate the number of business days (weekdays) between two dates, excluding weekends.
timezone-converter
Convert time between different time zones worldwide. See what time it is anywhere.
trending-tools
View all →gas-price-calculator
Calculate fuel cost for your trip based on distance, fuel efficiency, and gas price.
currency-converter
Convert between USD, EUR, KRW, JPY, GBP and 10+ currencies with latest rates.
gold-price-calculator
Calculate the value of gold by weight. Grams, ounces, and troy ounces.
inflation-calculator
Calculate how inflation changes the value of money over time.
salary-tax-calculator
Calculate take-home pay after taxes. See federal and state tax estimates.
loan-calculator
Calculate monthly payments, total interest, and amortization for any loan.
crypto-profit-calculator
Calculate profit or loss on Bitcoin, Ethereum, and other cryptocurrency investments.
draft-age-calculator
Check if you are within the military draft age range. Based on Selective Service rules.
health-tools
View all →Why Use UtiliCalc?
UtiliCalc provides free online calculators and converters that work instantly in your browser.
All tools are free, require no signup, and work on any device.
About UtiliCalc
UtiliCalc is your all-in-one hub for 50+ free online calculators and converters. From unit conversions (cups to ml, fahrenheit to celsius) to financial tools (loan calculator, tip calculator), every tool is free, instant, and requires no signup. Built for speed and accuracy, UtiliCalc works on any device — desktop, tablet, or mobile.
Frequently Asked Questions
Is UtiliCalc really free?
Yes, all 50+ calculators and converters are completely free with no signup, no ads paywall, and no usage limits.
What types of calculators are available?
We offer unit converters (length, weight, temperature, volume), financial calculators (tips, percentages, discounts), date & time tools, text utilities, and more — organized by category for easy browsing.
Do the calculators work offline?
Most calculators work entirely in your browser and don't require an internet connection after the page loads. Some tools that fetch live data (like currency rates) do need connectivity.
Can I use UtiliCalc on my phone?
Absolutely. UtiliCalc is fully responsive and optimized for mobile, tablet, and desktop. All tools work seamlessly on any screen size.
Free Online Calculators & Converters
Your all-in-one free calculator hub. 50+ calculators including percentage calculator, tip calculator, discount calculator, unit converter, and temperature converter. From cups to ml to fahrenheit to celsius — every calculation you need, all in one place.