Education & Everyday Calculators
Free calculators for students, teachers and everyday life: grade, GPA, exam percentage, attendance, final grade, study time, averages, fractions, ratios, percentage change, date difference, working days, time duration and age.
From working out the mark you need in a final exam to counting the working days until a deadline, everyday maths comes up all the time. Our education calculators help students track grades, GPA and attendance, while our everyday calculators handle percentages, fractions, dates and ages without the risk of a slip on a phone calculator.
Each tool explains how the answer was reached, which makes them useful for checking homework and learning the method, not just getting the number.
Grade and exam calculators
Grade Calculator
Calculate your overall course grade from weighted assignments, quizzes and exams.
GPA Calculator
Work out semester and cumulative GPA from course grades and credit hours on a 4.0 scale.
Exam Percentage Calculator
Turn obtained marks and total marks into a percentage for a single exam or a full result.
Final Grade Calculator
Find the score you need on your final exam to reach a target grade for the course.
Attendance Calculator
Calculate attendance percentage and how many classes you can miss or must attend to meet a requirement.
Study and reading calculators
Study Time Calculator
Plan study hours per subject from the days left until your exams and the topics to cover.
Reading Time Calculator
Estimate how long a text, chapter or speech takes to read from its word count and reading speed.
Maths calculators
Average Calculator
Find the mean, median, mode and range of any list of numbers, plus weighted averages.
Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers, with simplified answers and steps.
Ratio Calculator
Simplify ratios, find missing values and scale ratios up or down for recipes, maps and mixes.
Percentage Change Calculator
Calculate percentage increase or decrease between two values, and percentage difference.
Date and time calculators
Date Difference Calculator
Count the days, weeks, months and years between two dates.
Working Days Calculator
Count business days between two dates, excluding weekends and holidays you choose.
Time Duration Calculator
Find the hours and minutes between two times, or add and subtract time durations.
Age Calculator
Calculate exact age in years, months and days from a date of birth, and days until the next birthday.
Handy formulas
- Percentage = Marks obtained ÷ Total marks × 100. For example, 425 out of 500 is 85%.
- Percentage change = (New value − Old value) ÷ Old value × 100.
- Attendance = Classes attended ÷ Total classes held × 100.
- Weighted grade = Sum of (score × weight) ÷ Sum of weights.
Why use an online grade or date calculator?
Grade weights, credit hours and calendar dates are easy to miscount by hand, especially across months of different lengths or leap years. A dedicated student calculator applies the rules consistently and shows each step. Writers and students can pair these tools with our word counter and text tools, while professionals planning deadlines may find the working days calculator useful alongside our payroll and overtime calculators.
CGPA conversion
CGPA to Percentage Calculator
Convert CGPA to a percentage on a 10 or 4 point scale, including the CBSE formula.
Frequently asked questions
How do I calculate my exam percentage?
Divide the marks you obtained by the total marks and multiply by 100. For example, 360 out of 450 is 360 ÷ 450 × 100 = 80%.
How is GPA calculated?
Multiply each course’s grade points by its credit hours, add the results, and divide by the total credit hours. On a 4.0 scale, an A is usually 4.0, a B 3.0 and a C 2.0, though scales vary by institution.
How do I work out the grade I need on my final exam?
Required final score = (Target grade − Current grade × (1 − Final weight)) ÷ Final weight. The Final Grade Calculator does this automatically.
Does the working days calculator include public holidays?
Weekends are excluded automatically, and you can add the public holidays that apply where you live, since holidays differ by country and region.
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