Education Calculators
Free, verified education calculators with step-by-step guides and reference data.
Balance Equation Calculator — Chemical Equation Balancer
Balance any neutral molecular chemical equation instantly using the algebraic method. See the coefficients plus a step-by-step element-count check.
Kinetic Energy Calculator — Translational & Rotational KE
Calculate kinetic energy (½mv²) or rotational KE (½Iω²). Supports kg/lb, m/s/mph/km/h, and RPM conversion. Joules or foot-pounds output.
Molarity Calculator — Concentration & Dilution (M1V1=M2V2)
Calculate molarity from mass and molar mass, or solve any dilution variable with M1V1 = M2V2. Instant results for lab and homework chemistry.
Momentum Calculator — Collisions & p = mv
Calculate momentum (p = mv) plus perfectly inelastic and perfectly elastic collision outcomes, with kinetic energy checked before and after.
Torque Calculator — Force, Lever Arm & Power/RPM Solver
Calculate torque from force and lever arm at any angle, or solve for torque, power, or RPM given any two values. Metric and imperial units.
Ideal Gas Law Calculator — Solve PV = nRT
Solve PV = nRT for pressure, volume, moles, or temperature. Auto-converts °C/°F to Kelvin and matches R to atm, kPa, or mmHg.
Percent Yield Calculator — Actual vs Theoretical Yield
Calculate percent yield from actual and theoretical yield in grams or moles. Instant result plus a plain-language read on what your yield suggests.
Inequality Calculator — Linear & Compound, Step-by-Step
Solve linear and compound linear inequalities step by step. Automatic sign-flip handling on negative multiplication/division, plus correct interval notation.
Rational Expressions Calculator — Simplify, Add, Multiply, Divide
Simplify, add, subtract, multiply, or divide rational expressions with full factoring steps — domain restrictions are always shown, even when they cancel out.
Grade Curve Calculator — Square-Root & Bell Curve
Curve a class's raw scores with the square-root curve formula, or bell curve them by mean-shift or SD-band letter grades.
LSAC GPA Calculator — LSAC CAS Recalculated GPA
Estimate your LSAC CAS GPA for law school applications. Handles repeated courses, transfer credit, and Pass/Fail grades the way LSAC actually does.
GRE & GMAT Score Calculator — Percentile & Total Score
Convert GRE Verbal and Quant scores into percentiles, or record your GMAT Focus Edition Total Score against the current mean. Official ETS/GMAC data.
JLPT Calculator — Pass Mark & Sectional Minimum Checker
Check whether your JLPT N1-N5 scores pass. Enter section scores to see your total and whether you cleared every sectional minimum.
SHSAT Score Calculator — Composite Score Recorder
Add your SHSAT ELA and Math scaled scores into a composite. Explains why there's no raw-to-scale table and why admission cutoffs aren't fixed.
MCAT Score Calculator — Total Score & Percentile Estimate
Add up your four MCAT section scores into a Total Score (472-528) and estimate your percentile rank using AAMC's current-cycle mean and standard deviation.
ACT Score Calculator — Composite Score & SAT Concordance
Calculate your ACT Composite score (Enhanced or Legacy) and convert it to an equivalent SAT score using the official 2018 ACT/SAT concordance tables.
GPA Calculator — Weighted & Cumulative GPA
Calculate weighted or unweighted GPA by course, or combine a prior GPA with a new semester. 4.0-scale grade points with Honors/AP bonuses.
AP Score Calculator — Estimate Your 1-5 AP Exam Score
Estimate your AP exam score (1-5) from composite points earned, with subject-specific historical curve thresholds for 10 major AP exams.
Scientific Notation Calculator — Convert & Calculate
Convert numbers to scientific, E, and engineering notation, or perform add/subtract/multiply/divide arithmetic directly in scientific notation.
Weighted Grade Calculator — Category Weights & Grade Needed
Calculate your weighted course grade from category weights and scores, plus the exact score needed on a remaining exam to hit your target grade.