Developer Utilities
Small developer utilities that save a trip to a random website. Encode and decode Base64, explain a regex, build UTM links, generate QR codes and vCards, and more — the everyday helpers. Free in your browser, and available by API when you need them in a script.
Developer Utilities
GPA to India percentage converter for applications
POST /edu/gpa-to-india-percent$0.002Developer Utilities
GPA to percentage converter
4.0 scale GPA to percent grade
POST /edu/gpa-to-percentage$0.002Developer Utilities
Grade from number of errors
percentage and letter grade
POST /edu/grade-from-errors$0.002Developer Utilities
Grade percentage from fraction
score out of total to % and letter
POST /edu/grade-percentage-from-fraction$0.002Developer Utilities
Possible final grade range
best and worst grades still reachable
POST /edu/grade-range-remaining$0.002Developer Utilities
GRE Total Score Combiner
Add Verbal and Quantitative Scores
POST /edu/gre-total-combine$0.002Developer Utilities
Lexical Density Calculator
Measure Content Word Ratio
POST /edu/lexical-density$0.002Developer Utilities
Linear grade curve calculator
add points to every score, cap at 100%
POST /edu/linear-grade-curve$0.002Developer Utilities
Minimum passing grade calculator
score needed on remaining work to pass
POST /edu/minimum-passing-grade$0.002Developer Utilities
Mixed number to improper fraction
whole + a/b to numerator/denominator
POST /edu/mixed-to-improper$0.002Developer Utilities
MLA format pages estimator
word count to pages (TNR 12, double space)
POST /edu/mla-pages-estimate$0.002Developer Utilities
Multiple choice exam score
correct, incorrect, blank + penalty
POST /edu/multiple-choice-score$0.002Developer Utilities
Next spaced repetition interval calculator
POST /edu/next-spaced-interval$0.002Developer Utilities
Participation Weighted Grade Calculator
POST /edu/participation-weighted-grade$0.002Developer Utilities
Score Above Mean Calculator
Point and Standard-Deviation Gap
POST /edu/percent-above-mean$0.002Developer Utilities
School percentage change calculator
find increases and decreases
POST /edu/percent-change-school$0.002Developer Utilities
Percentage to fraction for school
show and simplify p/100
POST /edu/percent-to-fraction$0.002Developer Utilities
Percentile band classifier
low, average, high score bands
POST /edu/percentile-band-classifier$0.002Developer Utilities
Plus and minus GPA converter
letter grades to grade points
POST /edu/plus-minus-gpa$0.002Developer Utilities
Points Lost to Target Grade Calculator
Remaining Point Budget
POST /edu/points-lost-to-grade$0.002Developer Utilities
Points needed for letter grade
total-points course calculator
POST /edu/points-needed-for-letter$0.002Developer Utilities
Pomodoro Finish Time Estimator
Include Short and Long Breaks
POST /edu/pomodoro-finish-time$0.002Developer Utilities
Prime Factorization for School
Steps and Exponents
POST /edu/prime-factorization-school$0.002Developer Utilities
Q&A questions in time calculator
POST /edu/qa-questions-time$0.002Developer Utilities
Range of grades calculator
highest minus lowest score spread
POST /edu/range-of-grades$0.002Developer Utilities
Text grade level from length
school grade from sentences and syllables
POST /edu/reading-level-grade$0.002Developer Utilities
Reading speed needed for a deadline
required WPM from pages and time
POST /edu/reading-speed-needed$0.002Developer Utilities
Round to decimal places
number before and after, free
POST /edu/round-to-places$0.002Developer Utilities
Rubric Weighted Score Calculator
Add Weighted Criterion Scores
POST /edu/rubric-weighted-score$0.002Developer Utilities
SAT total score combiner
EBRW + Math on the 400–1600 scale
POST /edu/sat-section-combine$0.002Developer Utilities
Scale grade to new maximum
rescale a score to a different point total
POST /edu/scale-grade-new-max$0.002Developer Utilities
Scale raw test score calculator
rescale scores to a new range
POST /edu/scale-raw-score$0.002Developer Utilities
Scientific notation for school
convert with place-value steps
POST /edu/scientific-notation-school$0.002Developer Utilities
Script reading time by WPM
silent and spoken duration calculator
POST /edu/script-reading-time$0.002Developer Utilities
How Many Slides Do You Need for a Presentation?
POST /edu/slides-for-minutes$0.002Developer Utilities
Words per slide budget
script words ÷ slides for concise decks
POST /edu/slides-words-budget$0.002Developer Utilities
Speech length vs time limit checker
estimate speaking time
POST /edu/speech-length-check$0.002Developer Utilities
Speech time from syllables
estimate speaking duration by delivery rate
POST /edu/speech-syllable-time$0.002Developer Utilities
Stanine from percentile calculator
convert percentile rank to 1–9
POST /edu/stanine-from-percentile$0.002Developer Utilities
Study hours per credit calculator
weekly study time from credits
POST /edu/study-hours-per-credit$0.002Developer Utilities
Thesis length estimator
calculate words and pages by chapter
POST /edu/thesis-length-estimate$0.002Developer Utilities
Exam time per question calculator
seconds and minutes per item
POST /edu/time-per-question$0.002Developer Utilities
Unique words count calculator
distinct vs total word ratio
POST /edu/unique-words-count$0.002Developer Utilities
Vocabulary words to goal
how many more words to learn
POST /edu/vocab-words-to-goal$0.002Developer Utilities
Weighted course grade calculator
category scores and syllabus weights
POST /edu/weighted-course-grade$0.002Developer Utilities
Weighted GPA with honors calculator
AP and honors course bonuses
POST /edu/weighted-gpa-honors$0.002Developer Utilities
Weighted grade average by category calculator
POST /edu/weighted-grade-average$0.002Developer Utilities
Weighted score out of total
category grades to a mark out of N
POST /edu/weighted-score-out-of$0.002Developer Utilities
What Percent Is X of Y? Percentage Calculator
POST /edu/what-percent-is$0.002Developer Utilities
Average words per sentence
measure sentence length and writing complexity
POST /edu/words-per-sentence$0.002Developer Utilities
Words to pages estimator
pages from word count, font, spacing, margins
POST /edu/words-to-pages$0.002Developer Utilities
Words to paragraphs estimator
word count to essay structure
POST /edu/words-to-paragraphs$0.002Developer Utilities
Standby power cost calculator
yearly phantom power from idle watts
POST /elec/standby-power-cost$0.002Developer Utilities
Area by coordinates calculator
shoelace polygon area from vertices
POST /eng/area-coordinates$0.002Developer Utilities
Azimuth and distance from coordinates calculator for survey stations
POST /eng/azimuth-from-coords$0.002Developer Utilities
Band brake torque calculator
Tb = (T1 − T2) × r
POST /eng/band-brake-torque$0.002Developer Utilities
Metal bar weight by material
steel, aluminum, copper, brass
POST /eng/bar-weight-by-material$0.002Developer Utilities
Simply supported center-load deflection calculator
max δ = PL³/(48EI)
POST /eng/beam-ss-point-center-deflection$0.002Developer Utilities
Bearing life hours calculator
convert L10 million revolutions at RPM
POST /eng/bearing-life-hours$0.002Developer Utilities
Belt Wrap Angle Calculator for Open Belt Drives
POST /eng/belt-wrap-angle$0.002