More Calculators
198 free more calculators tools in the Calculators & Converters collection — every one runs in your browser with no signup and no uploads. Page 1 of 2.
Discount & Sale Price Calculator
Find the sale price, work out % off, or combine multiple stacked discounts.
Tally Counter
A free online click counter that remembers your count
Cost Per Serving Calculator
Add up recipe ingredient costs and divide by servings to get the cost of each portion.
Random Letter Generator
Pick one or more random letters from A to Z
Significant Figures Calculator
Count the significant figures in a number and round to any number of sig figs
Hypotenuse Calculator
Find the hypotenuse or a missing leg of a right triangle with the Pythagorean theorem
ABV Calculator
Calculate alcohol by volume from original and final gravity readings
AMM Price Impact Calculator
Calculate price impact for large trades on constant-product AMMs
Anchor Scope & Chain Calculator
Calculate required anchor chain scope for safe holding in any depth and conditions
Apparent Attenuation Calculator
Measure how thoroughly your yeast fermented the available sugars from OG and FG.
Australia Annual Leave Entitlement Calculator
Calculate Australian 4-weeks minimum annual leave with shift-worker rules
Aviation Fuel Reserve Calculator (VFR/IFR)
Calculate trip, alternate, and 45-minute reserve fuel per FAR 91.151/91.167
Brew Batch Scaling Calculator
Scale any homebrew recipe up or down to a new batch volume.
Bead Count & Spacing Calculator
Calculate bead counts and spacing for bracelets, necklaces, and patterns
Beaufort Scale Wind & Sea State Reference
Convert Beaufort force to wind speed, wave height, and sea-state description
Bee Colony Honey Yield Estimator
Estimate seasonal honey yield from colony strength, forage area, and nectar flow
Beekeeping Honey Yield Estimator
Estimate honey yield from hive inspection data
Hop Bitterness Decay Calculator
Model IBU reduction over storage time and temperature for hop-forward beers
Beer Style Parameter Range Checker
Check if your OG, FG, IBU, ABV, and SRM fit the BJCP style guidelines
Big Integer Calculator
Perform arithmetic on arbitrarily large integers beyond float64
Billable Hours Calculator
Convert time entries to billable fees at multiple rate tiers in seconds
Board Feet Calculator
Calculate board feet from thickness, width, and length in seconds
Brew Water Boiling Hardness Reducer
Calculate carbonate hardness reduction from pre-boiling brewing water
Brew Day Timeline Planner
Build a timed, step-by-step brew day schedule from your start time and step durations.
Wine Chaptalization (Sugar Addition) Calculator
Calculate the sugar needed to raise must Brix to a target potential ABV
Canada EI Premium Calculator
Calculate Canadian Employment Insurance premiums for employee and employer
Capital Gains Tax Calculator (2026)
Calculate federal long-term and short-term capital gains tax
Cat Food Daily Portion Calculator
Calculate ideal daily food amount for your cat
CE Marking Decision Tree
Find the right CE directives and conformity route for your product.
Child Tax Credit Calculator
Calculate your 2026 federal Child Tax Credit and phase-out
Cider ABV Calculator
Calculate the alcohol content of hard cider from juice gravity and FG.
Cloud Base Calculator
Estimate convective cloud base from surface temperature and dew point spread
Coin Collection Insurance Value Estimator
Total your coin collection's declared value for insurance
Coin Grading Reference Tool
Look up Sheldon scale (1-70) coin grade descriptions and values
Combustion Air Opening Size Calculator (IMC 701)
Size combustion air openings for fuel-burning equipment rooms per IMC 701
Contingency Fee Calculator
Calculate attorney fees, costs, and net-to-client on contingency cases
Cooling Load Quick Estimate (Rule of Thumb) Calculator
Estimate tonnage from floor area, window ratio, and climate zone — fast pre-quote sizing
Copyright Term Calculator
Determine whether a US work is still in copyright or in the public domain
Potassium Shift Calculator (pH Correction)
Estimate true potassium after correcting for blood pH
Corrected Sodium for Hyperglycaemia
Adjust measured serum sodium for elevated blood glucose
Countersink Depth Calculator
Find countersink depth for any screw head diameter and countersink angle
Court Deadline Calculator
Count calendar or business days to compute litigation deadlines accurately
Crop Insurance Premium Estimator
Estimate federal crop insurance premium for APH and revenue protection plans
Crop Rotation Nitrogen Credit Calculator
Estimate nitrogen credit from a previous legume crop to cut fertilizer needs
Crossover Frequency Calculator
Find the cap and inductor values for a passive speaker crossover.
Crosswind & Headwind Component Calculator
Resolve wind into headwind and crosswind components for any runway
CSF Analysis Interpreter
Classify CSF results across bacterial, viral, fungal and TB meningitis
Dark Frame Count Optimization Calculator
How many dark frames do you actually need for calibration?
dB SPL Distance Calculator
Predict how loud a source is at a new distance using the inverse square law.
Density Altitude Calculator
Find density altitude from pressure altitude, temperature, and dew point
Dew Point Risk Calculator for Optics
Know if your telescope mirror or lens will dew over tonight
Digital Product Passport Readiness Checker
Assess readiness for the EU Digital Product Passport under Ecodesign (ESPR)
Distance to Horizon Calculator
Find geometric, refraction-corrected, and radar horizon distance from eye height
District of Columbia Disability & Paid Family Leave Benefit Calculator
Estimate your District of Columbia state disability or paid family leave weekly benefit amount.
Dividing Head Calculator
Find the hole circle and turns for 40:1 simple indexing
DKA IV Fluid Regime Calculator
Calculate DKA fluid replacement and potassium supplementation volumes
DMA Gatekeeper Test
Check if your platform meets EU Digital Markets Act gatekeeper thresholds.
DNA/RNA Quantitation by Absorbance (A260) Calculator
Convert an A260 reading to ng/uL for DNA, RNA, or oligos
Dog Food Daily Portion Calculator
Calculate ideal daily food amount for your dog by weight and activity
Dry Hop Biotransformation Window Calculator
Time dry hop additions to the active fermentation biotransformation window
EU Accessibility Act (EAA) Applicability Checker
Determine if your product or service must comply with the EAA
EIP-1559 Transaction Fee Calculator
Calculate Ethereum EIP-1559 effective gas price, max fee, and miner tip
EU Public Holiday Counter
Count working days between dates for any EU27 country
Federal Estate Tax Calculator (2026)
Estimate federal estate tax above the 2026 exemption
Fetal Growth Centile Calculator (INTERGROWTH-21st)
Plot estimated fetal weight against gestational-age centiles
Flight Plan Fuel Summary Calculator
Summarize multi-leg fuel burn, reserves, and total required fuel for a flight plan
Font Size Conversion Chart
Convert between pt, px, em, rem, and percentage instantly
FPV Video Frequency Channel Planner
Plan FPV frequencies to avoid interference at a flying session
Aircraft Fuel Burn & Endurance Calculator
Calculate endurance, range, and reserve fuel from burn rate and usable fuel
Gas Appliance Combustion Efficiency Calculator
Estimate stack efficiency from flue gas O₂ or CO₂ and temperature (Siegert)
Trade Intensity & Export Revenue Estimator
Estimate export revenue potential by market using GDP per capita and trade intensity
Glide Distance Calculator
Calculate engine-out glide range and time aloft from height and glide ratio
Gravity Points Per Pound Calculator
Predict your original gravity from grain weight, extract potential, and efficiency.
GZ Stability Curve Basic Estimator
Estimate righting lever GZ values and metacentric height from simplified ship inputs
Hat Size Conversion Chart
Convert hat sizes between US, UK, EU, S/M/L, and head circumference
Hop Substitution AA% Adjuster
Adjust hop weight when swapping varieties so the bitterness stays the same.
HSA vs FSA Calculator
Compare HSA and FSA tax savings for 2026 contributions
IATA Live Animal Regulations Quick Reference
Look up container type, ventilation, and document requirements for air live-animal shipments
IBU Rager Calculator
Calculate hop bitterness using the Rager utilization formula
IBU Tinseth Calculator
Calculate International Bitterness Units using the Tinseth formula
Industrial IoT Cybersecurity Risk Checker (IEC 62443)
Assess ICS and OT system cyber risk against IEC 62443 security levels
Impermanent Loss Calculator
Calculate impermanent loss for AMM liquidity pool positions
Dual Native ISO Equivalence Calculator
Find equivalent exposures across a camera's dual native ISO base values
Visual Limiting Magnitude Calculator
Estimate the faintest visible star with any telescope aperture
LPG / Propane Conversion & Sizing Calculator
Convert propane BTU to gallons, size a storage tank, and check orifice sizing vs natural gas.
Mach Number Calculator
Convert between true airspeed and Mach number at any air temperature
METAR Decoder
Parse and translate a raw METAR weather report into plain English
Metric–Imperial Conversion Reference
Key conversion factors for length, mass, volume, and temperature
Microphone Self-Noise & SNR Calculator
Calculate microphone SNR and minimum detectable SPL from spec-sheet values
Product Liability Classification Checker for Digital Products (EU/UK)
Find out if your digital or connected product carries producer liability
Number System Conversion Reference
Binary, octal, decimal, and hex equivalents side by side
OECD Pillar Two Global Minimum Tax Calculator
Estimate top-up tax under the OECD Pillar Two 15% global minimum tax.
OG/FG/ABV Advanced Calculator
Full original gravity, final gravity, and ABV with attenuation metrics
Online Course Completion Planner
Plan daily lesson targets to finish a course by deadline.
Beer Freshness Window Calculator
Estimate shelf life and freshness windows by style and packaging method
Parti-Gyle Gravity Calculator
Split runnings into multiple beers and predict each runnings' gravity
Pellet to Whole Hop Conversion
Convert hop weights between pellet and whole/plug hop formats
Pet Vaccination Schedule Calculator
Generate a puppy or kitten vaccine and booster schedule
Planet Altitude & Azimuth Calculator
Compute a planet's position (alt/az) for any date, time, and location
Proof-of-Work Hash Demo
Interactively mine a block hash with adjustable difficulty in the browser