Free Online Calculators
60+ calculators for finance, math, home improvement, and everyday tasks. 100% free, no signup required.
Finance
Tip Calculator
Calculate tip amount and split bills easily between friends.
Mortgage Calculator
Estimate your monthly mortgage payments and total interest.
Compound Interest
See how your savings grow over time with compound interest.
Loan Calculator
Calculate monthly loan payments and total interest costs.
Salary Calculator
Convert between hourly, weekly, monthly, and annual salary.
Auto Loan Calculator
Calculate monthly car payments and total financing costs.
Discount Calculator
Calculate sale prices and how much you save on discounts.
Stacked Discount Calculator
Calculate final price with multiple discounts and cashback.
Sales Tax Calculator
Calculate GST, HST, PST for any Canadian province or US state.
Inflation Calculator
Calculate how inflation affects purchasing power over time.
Retirement Calculator
Plan how much you need to save for retirement.
Loan Payoff Calculator
See how extra payments help you pay off debt faster.
Rent vs Buy Calculator
Compare the true cost of renting versus buying a home.
FIRE Calculator
Calculate your path to Financial Independence, Retire Early.
Net Worth Calculator
Track assets and liabilities to calculate your net worth.
True Hourly Wage
Find your real earnings after factoring in work expenses.
Subscription Calculator
Track all your subscriptions and see what you're really spending.
Freelancer Rate Calculator
Find what to charge after taxes, expenses, and unbillable time.
Date and Time
Age Calculator
Calculate your exact age in years, months, and days.
Life Statistics
Your life in numbers: days, heartbeats, breaths, and milestones.
Date Difference
Find the number of days between two dates.
Time Zone Converter
Convert time between cities worldwide with live clock.
Countdown Timer
Count down days, hours, and minutes to any event.
Time Calculator
Add or subtract hours, minutes, and seconds.
Meeting Planner
Find the best meeting time across multiple time zones.
Math and Education
Percentage Calculator
Calculate percentages, increases, decreases, and more.
GPA Calculator
Calculate your Grade Point Average from your grades.
Fraction Calculator
Add, subtract, multiply, and divide fractions easily.
Random Number Generator
Generate random numbers, roll dice, or flip coins.
Scientific Notation
Convert and calculate with scientific notation.
Ratio Calculator
Solve proportions and simplify ratios easily.
Hex/Binary Converter
Convert between hex, binary, decimal, and octal.
Grade Calculator
Calculate weighted grades and final exam scores needed.
Average Calculator
Calculate mean, median, mode, and range of numbers.
Converters
Unit Converter
Convert between different units of measurement.
Square Footage Calculator
Calculate area for rooms, floors, and land in any shape.
Cooking Converter
Convert cups, tablespoons, teaspoons, and other kitchen measurements.
Temperature Converter
Convert between Fahrenheit, Celsius, and Kelvin.
Data Storage Converter
Convert between bytes, KB, MB, GB, and TB.
Shoe Size Converter
Convert between US, UK, EU, and CM shoe sizes.
Color Converter
Convert between HEX, RGB, and HSL color formats.
Home Improvement
Everyday Tools
Password Generator
Generate secure, random passwords with custom options.
Gas Mileage Calculator
Calculate MPG and estimate fuel costs for trips.
Worth the Drive
Is driving for savings worth your time and gas?
Parking Cost Calculator
Compare hourly, daily, and monthly parking costs.
Bill Splitter
Split bills with tip, tax, and unequal portions.
Electricity Cost Calculator
Calculate how much your appliances cost to run.
Dog Age Calculator
Convert your dog's age to human years by size.
Subnet Calculator
Calculate IP subnet info from CIDR notation.
Ring Blank Sizing
Calculate blank length for any ring size and metal thickness.
Bracelet Size Calculator
Find the perfect bracelet or bangle size for any wrist.
Necklace Length
Find the perfect chain length for any style.
Pace Calculator
Calculate pace, time, or distance for running and cycling.
Meeting Cost Calculator
See the real cost of meetings based on attendee salaries.
Commute Cost Calculator
Calculate the true cost of commuting including gas, parking, and time value.
How UglyCalc Works
Choose Your Calculator
Browse our collection of 60+ calculators organized by category, or use the search bar to find exactly what you need. From mortgage calculations to unit conversions, we have tools for every situation.
Enter Your Values
Input your numbers using our clean, intuitive interface. Results calculate instantly as you type, with no need to click a "calculate" button. Adjust values and see updates in real-time.
Get Instant Results
View your results immediately with clear formatting and helpful context. Each calculator includes explanations of the formulas used and practical tips for applying the results.
Why Trust UglyCalc
Industry-Standard Formulas
Our calculators use the same mathematical formulas employed by banks, financial institutions, and professionals. We reference authoritative sources including the Consumer Financial Protection Bureau, SEC, and IRS guidelines to ensure our financial calculators produce results you can rely on for important decisions.
Complete Privacy
Every calculation runs entirely in your browser. Your financial figures, health data, and personal information never leave your device. We don't track what you calculate, and we don't store any of your inputs. When you close the page, your data is gone completely.
Designed for Everyone
Accessibility is built into every calculator. Our Large Text Mode increases all fonts and buttons for users with visual impairments or anyone who prefers larger text. High-contrast themes, keyboard navigation, and semantic HTML ensure our tools work well with screen readers and assistive technologies.
Built by Engineers
UglyCalc is developed by The Ugly Empire team, software engineers with backgrounds in financial services, technology, and educational software. We test every calculator against known values, verify edge cases, and regularly audit our formulas to ensure continued accuracy as standards evolve.