๐ Academic
Free academic tools: GPA calculator, grade calculator, test score, and more. All run locally in your browser.
A focused set of study helpers: grade and GPA calculations, weighted scores, test outcome estimates. Small tools, but they answer the questions students actually ask at midnight before an exam.
Where grading systems differ between countries or institutions, the tools explain which scale they follow and how to adapt the inputs. That transparency matters, because a โBโ means different things in different systems.
Tools currently cover grade and GPA math and weighted score calculation; the set grows with the site.
Battery Life Calculator
Estimate how long a battery will last. Enter the capacity in mAh or Ah and the c
Class Schedule Generator
Create a weekly class schedule for Monday to Friday. Add courses with days and t
Frequency to Wavelength Calculator
Convert frequency to wavelength and back using the speed of light. Enter Hz, kHz
German Grade Average Calculator (Notenschnitt)
German school grade average (Notenschnitt): enter grades 1+ to 6, weight written
GPA Calculator
Calculate your Grade Point Average online for free. Supports percentage, letter
Grade Calculator
Calculate your weighted grade average with our free grade calculator. Add multip
LED Resistor Calculator
Calculate the current-limiting resistor for any LED. Enter supply voltage, LED f
Parallel Resistance Calculator
Work out the total resistance of resistors in parallel. Enter two to four resist
School Supplies Checklist
Build a school supplies list for preschool, elementary, middle, high school, or
Typing Speed Test
Test your typing speed with our free online WPM test. Type a sample paragraph an
Voltage Divider Calculator
Calculate the output voltage of a resistor voltage divider. Enter the input volt
Frequently asked questions
Are these academic tools free?
Yes. Every tool is free, needs no sign-up and runs in your browser.
Which GPA scale do the calculators use?
The common 4.0 scale, with each tool page explaining how to map other scales onto it.
Can I calculate weighted grades?
Yes โ weightings per component (exams, homework, projects) are configurable inputs, not fixed assumptions.
Do the tools store my grades?
No. Everything is computed locally; your entries stay on your device.
Will more academic tools be added?
Yes, the collection expands over time alongside the rest of the site.