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RechnerpilotCalculation platform for everyday life, finance, data and technology
108 calculatorsLive resultsStep-by-step solutions
OverviewLatest
Mathematics

Rechnerpilot's math calculators solve everyday and school problems and show every step of the working. From a quick percentage to the statistical summary of a whole data set, each result is explained so you can follow exactly how it was reached.

All calculators: Mathematics ↗

Arithmetic & Algebra

  • Calculator
  • Fraction Calculator
  • Percentage Calculator
  • Discount Calculator
  • Surcharge Calculator
  • Percentage Change
  • Rule of Three Calculator

Statistics & Data Analysis

  • Grade Average Calculator
  • Statistics Calculator

Units & Conversion

  • Universal converter

Everyday Mathematics

  • Tip Calculator
  • Price Comparison Calculator
  • Margin Calculator
  • Recipe Converter
Finance

The finance calculators help with tax questions, loan planning and commercial arithmetic. Every result is shown with its formula and worked solution, so the numbers stay transparent and easy to check.

All calculators: Finance ↗

Investments & Wealth

  • Interest Calculator
  • Savings Plan Calculator
  • ETF Calculator
  • Withdrawal Plan Calculator
  • Compound Interest Calculator
  • Compound Interest Table
  • Savings Calculator
  • Overnight Deposit Calculator
  • Fixed Deposit Calculator
  • Savings Book Calculator
  • Current Account Calculator
  • German Capital Gains Tax Calculator (Abgeltungsteuer)
  • German Advance Lump-Sum Tax Calculator (Vorabpauschale)
  • Early Withdrawal Interest Calculator
  • German Retirement Investment Account Calculator
  • Return Calculator
  • Effective Interest Calculator
  • Inflation Calculator

Loans & Financing

  • Loan Calculator
  • Amortization Calculator
  • Property purchase cost calculator
  • Mortgage financing calculator
  • Buy-or-rent calculator
  • Property yield calculator
  • Leasing calculator
  • Car financing calculator

Taxes

  • German VAT Calculator (19% / 7%)
  • Real estate transfer tax calculator
  • German Vehicle Tax Calculator (Kfz-Steuer)

Business Finance

  • Cash Discount Calculator

Banking & Payments

  • Late Payment Interest Calculator
  • Day Count Calculator
  • Currency converter
  • IBAN checker
Household

The household calculators support you in planning energy costs and your personal budget. Work out the electricity a single appliance draws, or map your income against your spending with the budget planner.

All calculators: Household ↗

Energy & Consumption

  • Electricity Cost Calculator
  • Heating cost calculator
  • Gas cost calculator
  • PV self-consumption calculator

Housing & Rent

  • Rent calculator
  • Living space calculator

Budget & Planning

  • Budget Calculator

Miscellaneous

  • Cash and Coin Counter
  • Mobile tariff calculator
Time & Date

The time calculators handle everything around dates, age and duration. Count the days between two dates, work out your exact age, or add up hours and minutes for your working-time records.

All calculators: Time & Date ↗

Date & Calendar

  • Date Calculator
  • Working Days Calculator
  • Deadline Calculator
  • Public Holidays Calculator
  • Age Calculator

Duration & Times

  • Hours Calculator
Work & Career

The work calculators help with pay questions, time tracking and leave planning. From gross-to-net salary and hourly rates to your holiday entitlement, every result comes with a worked solution you can retrace. The salary figures follow German tax and social-security rules.

All calculators: Work & Career ↗

Working Time & Tracking

  • Working Time Calculator
  • Overtime Calculator

Salary & Income

  • Hourly Wage Calculator
  • Gross-Net Calculator
  • German Public Service Salary Calculator

Vacation & Leave

  • German Vacation Entitlement Calculator (BUrlG)

Project Management

  • Project Time Calculator
Mobility

The mobility calculators work out trip costs, fuel consumption and the share each passenger pays. They are ideal for commuters, car pools and planning longer drives before you set off.

All calculators: Mobility ↗

Car & Fuel

  • Fuel Cost Calculator
  • Car cost calculator

Electric Mobility

  • EV charging cost calculator
Health

The health calculators help you make sense of body metrics such as BMI or daily calorie needs. Every result is placed in context and explained, so a number never stands on its own.

All calculators: Health ↗

Body & Weight

  • BMI Calculator
  • Ideal Weight Calculator
  • Calorie Calculator

Pregnancy & Birth

  • Pregnancy Calculator
Sports & Training

Rechnerpilot's sport and training calculators help you plan endurance, strength and multisport training. From heart-rate zones and VO₂max through race predictions and FTP to swim CSS and triathlon target times, every result comes with a worked solution.

All calculators: Sports & Training ↗

Endurance & Running

  • Running Prediction Calculator
  • Pace Calculator
  • VDOT & Training Pace Calculator
  • Running Age Grade Calculator
  • Heart Rate Zone Calculator
  • VO₂max Calculator
  • Hiking Time Calculator
  • Rowing Ergometer Calculator

Strength Training

  • 1RM Calculator
  • RPE/RIR Training Weight Calculator
  • Barbell Plate Loading Calculator
  • Powerlifting score calculator

Cycling

  • FTP Calculator
  • Cycling Power Calculator
  • Bicycle Gear Calculator

Swimming

  • Swimming CSS Calculator

Multisport

  • Triathlon Target Time Calculator
Developer

The developer tools generate UUIDs, cryptographic hashes and Base64 encodings right in the browser. Every operation runs locally through the Web Crypto API — no data ever leaves your device.

All calculators: Developer ↗

Cryptography & Security

  • Hash & Password Hash Generator
  • UUID Generator

Encoding & Formats

  • Base64 Encoder
  • URL Encoder
  • JSON Formatter

Development Tools

  • Regex tester
Generators

The generators create random numbers, lottery draws, secure passwords and placeholder text from parameters you choose. Everything is generated locally in your browser, so nothing is sent anywhere.

All calculators: Generators ↗

Random & Lottery

  • Random Number Generator
  • Lottery Number Generator

Text & Names

  • Lorem Ipsum Generator
  • Name Generator

Organization & Design

  • Team Generator
  • QR Code Generator
  • Colour Generator

Security

  • Password Generator
  1. Home
  2. Mathematics
  3. Arithmetic & Algebra
  4. Basic Arithmetic

Arithmetic & Algebra

Basic Arithmetic

Calculators in the Basic Arithmetic topic.

Calculator

Calculator

A modern calculator app for basic arithmetic, parentheses, percentages, memory, history and keyboard control.

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Fractions

Fraction Calculator

Add, subtract, multiply and divide fractions, reduce and expand them – calculated exactly, with a reduced result, mixed number and calculation steps.

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Rechnerpilot

Calculation platform for everyday life, finance, data and technology.

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