Calcrivo at a glance
- 19,000+ Calculators
- 200 Countries
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Calculate Anything. Explore Everything.
Free online calculators across every category and country. Simple. Fast. Global.
Why Calcrivo
- 19,000+CalculatorsFrom basic to advanced
- 200CountriesWith local versions
- 11CategoriesFor every need
- OfflineWorks offlineOnce a page has loaded
- 100% FreeNo Sign UpInstant access
- Accurate & ReliableAlways up to dateVerified on each build
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View AllCalcrivo at a glance
- 19,000+CalculatorsFrom basic to advanced
- 200CountriesWith local versions
- 11CategoriesFor every need
- OfflineWorks offlineOnce a page has loaded
- 100% FreeNo Sign UpInstant access
- Accurate & ReliableAlways up to dateVerified on each build
Popular Calculator
Explore Popular Categories
Find the right calculator for every part of your life.
- 100% Free: All calculators are completely free to use
- No Sign Up: Use instantly, no registration required
- Privacy Focused: Your data stays on your device
- Always Updated: Regularly updated with new calculators
- Tested Formulas: Every formula is covered by automated tests against worked examples
- Country Versions: Local currency and rules where a country version exists
Calculators around the world
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Discover useful calculators from every country around the world
Worldwide Access
Calculators for 200 countries
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Finance, Health, Math & more
Instant Results
Calculated in your browser as you type
Tested Formulas
Automated tests against worked examples
Most Used Calculators
The tools people reach for first
- #1Mortgage CalculatorFinancial
- #2BMI CalculatorFitness & Health
- #3Percentage CalculatorMath
- #4Loan CalculatorFinancial
- #5Scientific CalculatorMath
- #6Age CalculatorOther
- #7Calorie CalculatorFitness & Health
- #8Income Tax CalculatorFinancial
- #9Auto Loan CalculatorFinancial
- #10Compound Interest CalculatorFinancial
Featured Categories
Networking
552+ calculators
- 5G Throughput Estimate Calculator
- Administrative Distance Comparison Calculator
- Antenna Gain And Range Calculator
- ARP Table Size Calculator
- Attenuation Over Distance Calculator
- Audio Bitrate And Size Calculator
- Backup Window Bandwidth Calculator
- Bandwidth Delay Product Calculator
Cyber Security
415+ calculators
- Access Review Effort Calculator
- AES Key Strength Calculator
- Alert Triage Capacity Calculator
- Annualised Loss Expectancy Calculator
- Argon2 Parameters Calculator
- Audit Sample Size Calculator
- Authentication Health Score Calculator
- Backup Encryption Time Calculator
Cloud
317+ calculators
- API Gateway Cost Calculator
- Application Load Balancer Capacity Calculator
- Athena Query Cost Calculator
- Aurora Cost Calculator
- Auto Scaling Instance Count Calculator
- Availability Zone Redundancy Cost Calculator
- Azure Advisor Savings Calculator
- Azure Availability Zone Planner
- View all categoriesExplore Calculators
Editor's Picks
- Crypto CalculatorCalculate crypto gains, losses and ROICalculate →
- EMI CalculatorCalculate loan EMI and repaymentCalculate →
- Percentage CalculatorFind percentage, difference and moreCalculate →
- ROI CalculatorCalculate return on investmentCalculate →
- Calories CalculatorTrack calories intake and burnCalculate →
Calculation Universe
- 19,813Calculators
- 423Subcategories
- 200Countries
- In-browserCalculations
What Calcrivo is
Calcrivo is a free collection of 19,813 online calculators across 11 categories: loans and mortgages, savings and tax, health and nutrition, maths and statistics, dates and units, and technical tools for networking, cloud, Linux, DevOps and security. You do not need an account, and the numbers you type are calculated in your browser rather than sent to us.
Every calculator shows the formula it uses. The most-used ones — such as the mortgage, EMI, BMI, age and percentage calculators — also explain the method step by step, work an example with real numbers, and answer the questions people ask about that specific calculation.
Formulas are covered by automated tests that check each calculator’s output against worked examples; the methodology page describes what is checked and what is not. Results are estimates for general information, not financial, tax, legal or medical advice.
For background on the maths, the 11 guides cover topics such as how EMI and amortisation work, compound interest, calculating GST, exact age calculation, BMI and its limits, and subnetting. If something looks wrong, the contact page reaches the person who maintains the site.