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28 focused calculators • no account required
Everyday calculations, made clear.
LifeAdmin gives you fast, practical calculators for money, dates, study, work and everyday life—with transparent formulas and useful explanations.
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✓ Inputs calculated in your browser✓ International units & currencies✓ Transparent assumptions
Popular tools
View all 28 tools →Go straight to the calculator
No category hunting—open a common task directly.
Money & Calculations
Percentage Calculator
Calculate what percentage one number is of another.
Open calculator Money & CalculationsDiscount Calculator
Find the discount amount and final price after a percentage reduction.
Open calculator Money & CalculationsLoan Calculator
Estimate monthly loan payments, total repayment and interest.
Open calculator Date & TimeAge Calculator
Calculate age accurately between a birth date and a reference date.
Open calculator StudentsGPA Calculator
Calculate weighted GPA from course credits and grade points.
Open calculator WorkHourly ↔ Monthly Salary Calculator
Convert pay between hourly, daily, weekly, monthly and annual periods.
Open calculator EverydayFuel Cost Calculator
Estimate fuel required and trip cost using metric or US fuel-efficiency inputs.
Open calculator EverydayUnit Converter
Convert length, mass, area, volume, temperature, speed, time and data units.
Open calculatorBrowse by category
Choose what you need to solve
Every category card opens its real tool list.
Money & Calculations
Percentage, discounts, salaries, savings, loans and bill splitting.
6 toolsDate & Time
Age, date differences, working days, countdowns and time zones.
6 toolsStudents
GPA, CGPA, attendance, grades and required-mark planning.
5 toolsWork
Pay conversions, working hours, overtime, freelance rates and notice periods.
5 toolsEveryday
Electricity, fuel, room area, paint and unit conversions.
6 toolsMore useful tools
Browse full directoryMore tasks, one click away
A quick preview across money, time, study, work and home calculations.
Salary CalculatorMoney & Calculations→Savings CalculatorMoney & Calculations→Date Difference CalculatorDate & Time→Working Days CalculatorDate & Time→Attendance CalculatorStudents→Grade CalculatorStudents→Working Hours CalculatorWork→Overtime CalculatorWork→Electricity Cost CalculatorEveryday→Paint CalculatorEveryday→
Why LifeAdmin
Trust comes from how the tools work
Less marketing, more practical safeguards.
Browser-side calculations
Calculator values in this build are processed in your browser, not submitted to a LifeAdmin account.
Transparent formulas
Each calculator explains its formula, assumptions, worked example and limitations.
International by design
Common currencies, units, dates and IANA time zones are supported where relevant.
Useful, not bloated
Practical calculations without the clutter
LifeAdmin intentionally focuses on 28 everyday tools instead of creating thousands of thin pages. Financial and cost calculators use the inputs you provide, date and time tools explain their assumptions, and student/work tools highlight where local or institutional rules can differ.
Learn how LifeAdmin is designed →Real inputsNo random or hard-coded calculator outputs.
Helpful validationImpossible and invalid values are explained clearly.
Clear resultsResults include context so you know what the number means.
FAQ
Common questions
Does LifeAdmin use fake live rates?
No. Tools that depend on local prices or rates ask you to enter them unless a verified live source is integrated later.
Are calculator results professional advice?
No. Results are informational estimates. Local laws, contracts, tax rules, lender methods and institution policies can change real-world outcomes.
Do I need an account?
No account is required to use the calculators in this version.
Ready when you are
Browse all calculators →Find the right calculator in seconds.
Browse all 28 tools or search by the task you need to solve.