Instant answers.
Smart tools.
BMI, CGPA, zodiac signs, moon signs — all the daily calculators you need, right in one place. Fast, free, and beautifully simple.
Free Sleep Calculator — Wake Up Refreshed
Find your perfect bedtime or wake-up time based on 90-minute sleep cycles. Whether you need to wake up by a specific time or want to know when to go to bed, get instant recommendations that help you avoid groggy mornings and wake up at the lightest sleep stage.
All tools
Calorie Calculator
Find your daily calorie needs for weight loss, maintenance, or muscle gain. Calculates BMR, TDEE, and macros instantly.
Budget Calculator
Plan your monthly budget with the 50/30/20 rule. Customize expense categories, see visual breakdowns, and track your surplus.
BMI Calculator
Check your Body Mass Index instantly. Metric & imperial, visual gauge, and ideal weight range.
Moon Sign Calculator
Reveal your moon sign by birth date. Includes all 12 signs, Vedic Rashi, compatibility guide, and emotional traits.
CGPA Calculator
Convert grades & credits. Track semester and cumulative GPA in one place.
Birth Sign Finder
Enter your birthday and discover your zodiac sign, personality traits and compatibility.
Loan Calculator
Monthly payment, true APR with fees, early payoff savings, and side-by-side loan comparison — for personal, auto & student loans.
Mortgage Calculator
Monthly payment with taxes & PMI, affordability checker, extra payment savings, 15 vs 30 year comparison, and full amortization.
Investment Calculator
Project your mutual fund SIP returns with monthly, quarterly or lump-sum investment scenarios.
Zakat Calculator
Calculate your annual Zakat on cash, gold, investments & business assets. Accurate nisab threshold with 2.5% rule.
Sleep Calculator
Find your perfect bedtime or wake-up time based on 90-minute sleep cycles — so you wake up refreshed, not groggy.
Age Calculator
Find your exact age in years, months, and days — plus your total days alive, birthday countdown, and upcoming milestones.
Percentage Calculator
6 modes in one: % of a number, % change, discount, exam marks, and more — with formula shown.
px → rem Converter
Convert px ↔ rem with live element previews, batch CSS conversion, and a full reference table. Custom base font size support.
Base64 Encoder / Decoder
Encode text or files to Base64, or decode it back. URL-safe mode, file upload, Unicode support — all in your browser, no data sent anywhere.
Unix Timestamp Converter
Paste any Unix timestamp or date — get ISO 8601, RFC 2822, UTC, local time, relative time, and more. Supports seconds & milliseconds.
Built for people, not algorithms
CalcMeter started with one idea: everyday tools shouldn't require an account, a subscription, or a PhD to use. Every calculator we build is free, fast, and designed to give you a clear, honest answer — nothing more.
We cite our sources (WHO, CDC, NIH) and explain what the numbers actually mean, so you leave more informed — not just with a number on a screen.
Read our story →Guides beyond the calculator
Science-backed reads on health, academics & more
CDC and Sleep Foundation sleep recommendations for every age group — newborns through older adults — plus the 4 sleep stages explained, sleep deprivation effects, and how to calculate your ideal bedtime using 90-minute cycles.