Gaming
51 free gaming tools in the Calculators & Converters collection — every one runs in your browser with no signup and no uploads.
Aircraft CG Envelope Check Tool
Compute loaded weight and CG, then check against a generic GA aircraft envelope
Baseball Launch Angle & Exit Velocity Guide
See how launch angle and exit velocity affect hit outcomes
Catan Dice Roll Probability Analyzer
Find the best Catan settlements by dice probability
Chess Elo Rating Calculator
Calculate expected score and new Elo after chess games
Chess Performance Rating Calculator
Calculate your tournament performance rating from results
Dice Tower & Anydice Probability Calculator
Compute probabilities for exploding dice, drop-lowest, and pool systems
D&D Advantage/Disadvantage Calculator
How much does advantage actually help your D&D rolls?
D&D Multiclass Proficiency & Spell Slot Tracker
Get proficiency bonus and combined spell slots for multiclass builds
D&D Custom Monster CR Builder
Calculate challenge rating for a custom D&D 5e monster
D&D Damage Per Round (DPR) Calculator
Calculate average DPR for any D&D 5e attack or spell
D&D Dice Probability Calculator
Exact probabilities for any D&D dice roll combination
D&D Encounter CR / XP Budget Calculator
Balance D&D 5e encounters by the book using XP thresholds
D&D Hit Points Calculator
Max and average HP for any D&D 5e character build
D&D Initiative Tracker
Track initiative order and HP for any D&D encounter
D&D Treasure / Loot Generator
Generate hoard or individual treasure by CR using DMG tables
D&D 5e Point Buy Calculator
Allocate ability scores with the D&D 5e point-buy system
D&D Proficiency Bonus & Skill Check Calculator
Calculate all skill and saving throw bonuses for any D&D character
D&D Wild Magic Surge Probability Calculator
Track and calculate Wild Magic Surge odds for sorcerers
D&D XP to Next Level Tracker
Track XP and milestone progression for any D&D 5e character
Dutch Grade Converter (1–10 Scale)
Convert Dutch university grades (1-10) to GPA and ECTS.
Supply Grille/Diffuser Velocity & CFM Calculator
Calculate CFM from neck velocity and grille area, or find velocity from CFM and neck size
MTG Draft Pick Evaluation Tool
Rank your MTG draft picks by power, color commitment, and curve
Red Cell Indices (MCV, MCH, MCHC) Calculator
Compute erythrocyte indices from a CBC to classify anaemia
MTG Combo Turn Estimator
Estimate the average turn you'll assemble a 2- or 3-card combo
MTG Deck Archetype Analyzer
Classify your MTG deck as aggro, midrange, control, or combo
MTG Commander Color Identity Checker
Verify card color identity legality for any EDH Commander deck
MTG Hypergeometric Draw Calculator
Probability of drawing any card combination from your MTG deck
MTG Land Count Optimizer
Find the optimal land count for your Magic deck
MTG Mana Curve Analyzer
Visualize and optimize your Magic: The Gathering mana curve
MTG Mulligan Probability Calculator
Odds of hitting your opening hand requirements in Magic
MTG Infect / Poison Counter Tracker
Track infect damage and poison counters in Magic: The Gathering
MTG Storm Count Calculator
Track your storm count and the copies a Storm spell will make
Neonatal Jaundice Phototherapy Threshold Calculator
Plot total serum bilirubin against gestational-age thresholds
Pipe Flow Velocity & Pressure Drop Calculator
Find flow velocity and Hazen-Williams friction loss for copper, PVC, CPVC, and steel pipe.
Renal Stone Risk Index Calculator
Urinary supersaturation indices for calcium oxalate and uric acid
RuneScape 3 XP & Level Calculator
See how much XP you need to reach the next RuneScape 3 level
Athlete Deload Week Planner
Calculate reduced training load for a structured deload week.
Warehouse Slotting Velocity Tool
Assign pick-face slots by ABC velocity and ergonomic zone to reduce travel
Custom Dice Pool Probability Table
Calculate the full probability distribution for any dice pool
Cash Envelope Budget Calculator
Split your take-home pay across spending envelopes
Parallelogram Calculator
Area, height, perimeter and diagonals of a parallelogram.
Dice Notation Roller
Roll full RPG dice notation: 3d6+2, 2d20kh1, 4d6dl1, exploding dice and more.
D&D Ability Score Calculator
Roll, buy, or array-assign your D&D 5e stats with modifiers, saving throws and XP thresholds.
Damage Per Second (DPS) Calculator
Calculate true DPS for any weapon, build or ability rotation in any game.
D&D 5e Encounter XP Calculator
Balance encounters by difficulty — Easy, Medium, Hard or Deadly.
D&D Spell Slot Tracker
Track every spell slot for every D&D 5e caster class in real time.
Experience Points (XP) Calculator
Build D&D 5e encounters, look up level-up thresholds and track character XP — all in one tool.
Loot Roll Generator
Simulate RPG loot tables with weighted drops, rarity tiers, and dice quantities.
MTG Life Counter
Track life totals, poison counters, commander damage and more for Magic - The Gathering.
D&D Critical Hit Calculator
Instantly see crit damage range, average, and full probability distribution.
Dice Probability Calculator
Exact probabilities for any dice roll — 2d6, 3d10, custom polyhedral dice.