ModernCalcs

Everyday Utilities

Quick, reliable calculators for daily math, shopping discounts, time tracking, developer tools and more.

Age Calculator
Exact age and Indian Govt job eligibility check (UPSC/SSC).
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Date & Festival Toolkit
Day counter, countdown to festivals, and FY tracking.
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Sleep Cycle Planner
Calculate best bedtime or wake-up time based on REM cycles.
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Business Days Calculator
Count working days between two dates excluding holidays.
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Countdown Timer
Set a visual countdown to any event or deadline.
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Date Add/Subtract
Add or subtract days, weeks, months from a date.
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Day of Week
Find the day of the week for any date in history.
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Day of Year
Find what day number of the year any date falls on.
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Days Between Dates
Calculate the exact number of days between two dates.
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Days Until Calculator
How many days until a future event or date?
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Event Countdown Timer
Create a real-time countdown to any upcoming event.
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Hours to Minutes
Instantly convert hours to minutes and seconds.
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Leap Year Calculator
Check if any year is a leap year and find the next one.
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Milliseconds Converter
Convert milliseconds to seconds, minutes and hours.
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Minutes to Hours
Convert minutes into hours and decimal hours.
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Pomodoro Timer
Boost productivity with timed focus and break intervals.
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Seconds to Time
Convert seconds into hours, minutes, and seconds.
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Stopwatch
A precise online stopwatch with lap tracking.
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Time Add/Subtract
Add or subtract time values quickly and accurately.
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Time Converter
Convert between time zones and time units.
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Week Number Calculator
Find the ISO week number for any date.
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World Clock
Check the current time in cities around the globe.
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Time Zone Converter
Convert times across different time zones worldwide.
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Paper Size Converter
Convert between A4, Letter, Legal and other paper sizes.
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Percent Off (Sale)
Calculate savings for sales like Big Billion Day.
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Power Converter
Convert between watts, kilowatts, horsepower and more.
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Pressure Converter
Convert between PSI, bar, pascal, atm and more.
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Roman Numeral Tool
Convert numbers to Roman and back (Student cheat sheet).
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Screen Size Converter
Convert screen resolutions and calculate pixel density.
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Speed Converter
Convert between mph, km/h, knots and m/s.
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Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
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Unit Converter
Universal unit converter for length, weight, volume and more.
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Volume Converter
Convert between liters, gallons, cups, pints and more.
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Words Per Page
Estimate pages needed for any word count and font size.
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Clothing Size Converter
Convert clothing sizes between US, UK, EU and India.
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Cooking Measurement Converter
Convert cups, tablespoons, grams and ml for recipes.
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Land Unit Converter
Convert Sq Ft to Bigha, Gaj, Cent, and Guntha (State-wise).
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Fuel Consumption Converter
Convert between MPG, L/100km and km/L fuel efficiency metrics.
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Discount Calculator
Quickly calculate the final price and your total savings.
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Ring Size Converter
Convert ring sizes between US, UK, EU and Indian standards.
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Shoe Size Converter
Convert India (UK) sizes to US and EU for online shopping.
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Electricity Bill (India)
State-wise DISCOM rates and appliance cost tracker.
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Fuel & Trip Cost
Petrol/Diesel trip cost and Petrol vs EV savings simulator.
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Gas Mileage Calculator
Calculate fuel cost and efficiency for any journey.
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Compound Interest Calculator
Calculate compound interest over time with different frequencies.
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Simple Interest Calculator
Calculate simple interest on loans and investments.
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Tax Calculator
Calculate taxes on purchases and income at different rates.
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Password Generator
Generate NIST-compliant secure passwords and passphrases.
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Password Strength Checker
Check how strong your password is and get improvement tips.
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Password Entropy Calculator
Calculate password entropy and security strength in bits.
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Memorable Password Generator
Generate secure yet easy-to-remember passphrase passwords.
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Writing Assistant
Get writing suggestions and check grammar.
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Syllable Counter
Count syllables in any word or text passage.
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Trailing Space Remover
Remove trailing whitespace from lines of text.
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License Generator
Generate open source license text for MIT, Apache, GPL and more.
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UTM Builder
Build UTM tracking URLs for Google Analytics campaigns.
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PDF Page Numbering
Add page numbers to PDF documents in the browser.
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PDF to Word
Convert PDF files to editable Word format in the browser.
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Google SERP Simulator
Preview how your page title and meta description appear in Google search.
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Date to Timestamp
Convert any date and time to a Unix timestamp.
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Timestamp to Date
Convert Unix timestamps to human-readable dates and times.
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Work Hours Calculator
Calculate total work hours and overtime from clock-in/out times.
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Data Storage Converter
Convert between bytes, KB, MB, GB, TB and more.
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HEIC to JPG Converter
Convert Apple HEIC photos to JPG format in the browser.
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PIN Generator
Generate secure random PIN codes of any length.
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CIDR Calculator
Calculate CIDR subnet ranges, host counts, and network addresses.
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Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
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Px to Rem Converter
Convert pixels to rem and em values for responsive CSS.
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Semver Calculator
Parse, compare, and validate semantic version strings.
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A/B Test Calculator
Calculate statistical significance and confidence for A/B test results.
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Dataset Analyzer
Upload a CSV dataset and get instant statistical summaries.
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QR Code Generator
Generate QR codes for URLs, text, email, and contact info.
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Random Number Generator
Generate random numbers within any custom range.
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Random Date Generator
Generate random dates within a custom range for testing.
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Random Time Generator
Generate random times for testing and mock data.
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Random Word Generator
Generate random words for brainstorming and placeholders.
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Fake Name Generator
Generate realistic fake names for testing and mock data.
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Fake Email Generator
Generate realistic fake email addresses for testing.
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Fake Address Generator
Generate realistic fake postal addresses for mock data.
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Fake Person Generator
Generate complete fake person profiles: name, email, address, and more.
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Fake Phone Generator
Generate realistic fake phone numbers for testing and mock data.
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Essential Tools for Everyday Life

Our Utilities hub is a digital swiss army knife for life – from calculating your exact age for a job application to finding the best time to sleep for maximum energy.

Shopping & Retail Math

Never guess the final price during a clearance sale. Our Discount and Percent-Off calculators help you find absolute savings in rupees, making your shopping sessions smarter.

Time, Dates & Security

Plan your year with our Date & Festival toolkit, manage your team's Overtime pay, or generate secure, NIST-compliant passwords to protect your online presence.

Developer & Data Tools

From QR code generators and color converters to CSV data cleaners and fake data generators – everything a developer needs in one place.

Designed for Utility

  • One-Click Copy: Move results to your email or notes instantly.
  • Offline Ready: Many tools continue to work even without an internet connection.
  • Clean Metrics: No aggressive tracking or data collection.
  • Mobile Optimized: Use these tools on the go during shopping or commuting.