Essential Utility Calculators
Everyday tools for time, dates, conversions, and school planning.
Life is full of little calculation challenges that don't fit into a neat "math" or "finance" box. How many days until your vacation? What is your GPA for the semester? How much concrete do you need for that backyard patio? Our Utility Calculators cover these diverse needs. From digital security (Password Generator) to construction (Concrete Calculator) to academic planning (GPA/Grade), these are the practical tools you didn't know you needed until now.
Age Calculator
Calculate your age in years, months, and days.
Date Calculator
Calculate the duration between two dates.
Time Calculator
Add or subtract time from a date.
Hours Calculator
Calculate hours worked and wages.
GPA Calculator
Calculate your Grade Point Average.
Grade Calculator
Calculate your class grade or final exam score.
Concrete Calculator
Estimate concrete needed for a project.
Subnet Calculator
IP subnet calculations for networking.
Password Generator
Generate strong, secure passwords.
Conversion Calculator
Convert between different units of measurement.
Everyday Calc FAQ
How secure is the Password Generator?
Extremely. The password is generated locally in your browser using cryptographic randomness. We never see it, save it, or transmit it. You can safely use the Password Generator for banking or email accounts.
Weighted vs. Unweighted GPA?
An unweighted GPA typically scales up to 4.0. A weighted GPA accounts for difficulty (like AP or Honors classes) and can go up to 5.0. Our GPA Calculator supports both methods to give you an accurate academic standing.
Are unit conversions exact?
Yes. We use standard conversion factors (e.g., 1 inch = 2.54 cm exactly). The Conversion Calculator provides high-precision decimal results, suitable for science, cooking, or engineering.
Why isn't a month just 30 days?
For accurate date math, you can't assume 30 days. Our Date Calculator accounts for leap years, 31-day months, and February's variance to give you the precise number of days between any two points in history.