A little help for
researchers.
Check the numbers. Keep your working data close. Your collection is a starting point; all tools remain available.
Weighted grade calculator
Calculate a grade from assessment scores and weights.
GPA calculator
Calculate credit-weighted grade points on a supplied scale.
Final exam score needed
Find the final exam score needed to reach your target.
Fraction simplifier
Reduce an integer fraction using the greatest common divisor.
Quadratic equation solver
Find real or complex roots of ax² + bx + c = 0.
Standard deviation calculator
Show sample and population standard deviation.
JSON key list
List top-level object keys.
JSON value list
List top-level object values.
JSON entry pairs
Convert a top-level object into key-value pairs.
JSON structure inspector
Report types, depth, node counts and array sizes for JSON.
JSON path list
List leaf values with escaped RFC 6901 JSON Pointer paths.
JSON flatten to pointers
Flatten leaf values into a map keyed by JSON Pointer.
Concentration grams per liter to concentration milligrams per liter converter
Convert concentration grams per liter (g/L) to concentration milligrams per liter (mg/L), reverse the direction, or convert a batch. Compare stated laboratory, water-quality and ingredient mass concentrations.
Concentration grams per liter to micrograms per liter converter
Convert concentration grams per liter (g/L) to micrograms per liter (µg/L), reverse the direction, or convert a batch. Compare stated laboratory, water-quality and ingredient mass concentrations.
Concentration grams per liter to concentration milligrams per milliliter converter
Convert concentration grams per liter (g/L) to concentration milligrams per milliliter (mg/mL), reverse the direction, or convert a batch. Compare stated laboratory, water-quality and ingredient mass concentrations.
Concentration grams per liter to grams per milliliter converter
Convert concentration grams per liter (g/L) to grams per milliliter (g/mL), reverse the direction, or convert a batch. Compare stated laboratory, water-quality and ingredient mass concentrations.
Concentration grams per liter to concentration kilograms per cubic meter converter
Convert concentration grams per liter (g/L) to concentration kilograms per cubic meter (kg/m³), reverse the direction, or convert a batch. Compare stated laboratory, water-quality and ingredient mass concentrations.
Concentration grams per liter to micrograms per milliliter converter
Convert concentration grams per liter (g/L) to micrograms per milliliter (µg/mL), reverse the direction, or convert a batch. Compare stated laboratory, water-quality and ingredient mass concentrations.
Kinetic energy calculator
Calculate classical translational kinetic energy for a mass and speed.
Gravitational potential energy
Estimate gravitational energy change at a chosen constant acceleration.
Linear momentum calculator
Find one-dimensional linear momentum.
Force from mass and acceleration
Calculate net force using Newton’s second law.
Mechanical work at an angle
Calculate work done by a constant force along a straight displacement.
Spring energy calculator
Estimate stored elastic energy and force for a linear spring.
Percentage calculator
Find a percentage of a number.
Percentage change
Compare a new value with an original nonzero value.
Percentage difference
Compare two nonnegative values using their average.
Discount calculator
Find the final price and saving after a percentage discount.
Word counter
Count words, lines and Unicode characters.
Character counter
Count code points, graphemes and UTF-8 bytes.
Reading time
Estimate reading time from your word count.
Uppercase converter
Convert text to uppercase.
File SHA-256 checksum
Compute a SHA-256 file checksum locally.
Text file generator
Download plain text as a UTF-8 file.
JSON file generator
Validate and download JSON as a formatted file.
CSV file generator
Normalize CSV and neutralize spreadsheet-formula prefixes.