Other Tools
52 free calculators
Date, time, construction, weather, and specialty calculators.
Age Calculator
Calculate exact age from date of birth. Find age in years, months, weeks, and days. See next birthday countdown.
Date Calculator
Calculate the number of days between two dates. Add or subtract days from a date. Find weeks, months, and years between dates.
Time Calculator
Add and subtract hours, minutes, and seconds. Calculate time duration between two times. Convert time to decimal hours.
Hours Calculator
Calculate total work hours between clock-in and clock-out times. Time card calculator for daily and weekly hours with overtime.
Time Zone Calculator
Convert time between different time zones. See current time in any city. Plan international meetings with world time zone calculator.
GPA Calculator
Calculate GPA for semester or cumulative grade point average. Supports 4.0 and weighted GPA scales for high school and college.
Grade Calculator
Calculate your final grade based on weighted assignments. Find what score you need on remaining work to achieve your target grade.
Concrete Calculator
Calculate how much concrete you need for slabs, footings, columns, and walls. Find cubic yards and number of 60 lb or 80 lb bags.
Square Footage Calculator
Calculate square footage of rooms, houses, and irregular shapes. Convert between square feet, square meters, and square yards.
Roofing Calculator
Calculate roofing materials: shingles, underlayment, and ridge caps needed. Accounts for roof pitch and waste factor.
Tile Calculator
Calculate how many tiles you need for floors and walls. Enter room dimensions and tile size to get tile count and boxes needed.
Gravel Calculator
Calculate how much gravel, crushed stone, or sand you need for driveways and landscaping. Find cubic yards and tons required.
Mulch Calculator
Calculate cubic yards and bags of mulch needed for garden beds and landscaping. Accounts for desired depth and area.
Fuel Cost Calculator
Calculate fuel cost for any road trip or commute. Find gas cost per mile and monthly fuel expenses based on MPG and gas price.
Gas Mileage Calculator
Calculate your car's gas mileage (MPG) or fuel efficiency (L/100km). Compare fuel economy between vehicles.
Mileage Calculator
Calculate mileage reimbursement using IRS standard mileage rates. Find total reimbursement for business, medical, and charity driving.
BTU Calculator
Calculate how many BTUs you need to cool or heat a room. Find the right AC or heater size based on room dimensions and climate.
Voltage Drop Calculator
Calculate voltage drop in electrical circuits. Find correct wire gauge for any distance and current to minimize power loss.
Ohm's Law Calculator
Calculate voltage, current, resistance, and power using Ohm's Law (V=IR). Enter any two values to find the other two.
Resistor Calculator
Decode resistor color codes for 4-band and 5-band resistors. Find resistance value from color bands or get colors for a target resistance.
Electricity Calculator
Calculate electricity consumption and cost in kWh. Find how much appliances cost to run and estimate monthly electricity bills.
Speed Calculator
Calculate speed, distance, or time using the speed formula (d=st). Convert between mph, km/h, m/s, and knots.
Density Calculator
Calculate density, mass, or volume using the density formula (ρ = m/V). Includes common material densities for reference.
Mass Calculator
Convert between mass and weight units: kg, grams, pounds, ounces, stones, and tonnes. Calculate mass from density and volume.
Day Counter
Count the number of days until any future event or since a past date. Business day counter also available. Countdown timer for events.
Golf Handicap Calculator
Calculate your golf handicap index using the World Handicap System (WHS). Find course handicap and net score for any tees.
Tire Size Calculator
Convert tire sizes and compare tire dimensions. Calculate diameter, width, and sidewall height from tire size codes like 205/55R16.
Stair Calculator
Calculate stair dimensions including rise, run, and number of steps. Ensures compliance with building code requirements.
IP Subnet Calculator
Calculate IP subnets, subnet masks, and CIDR notation. Find network address, broadcast address, host range, and number of hosts.
Bandwidth Calculator
Calculate internet bandwidth requirements and file transfer times. Convert between Mbps, GB, and transfer duration.
Wind Chill Calculator
Calculate wind chill (feels like temperature) from air temperature and wind speed. Supports Fahrenheit/Celsius and mph/km/h.
Heat Index Calculator
Calculate the heat index (feels like temperature in heat). Find apparent temperature from air temperature and relative humidity.
Dew Point Calculator
Calculate dew point temperature from air temperature and relative humidity. Find relative humidity from temperature and dew point.
Dice Roller
Roll virtual dice online. Supports d4, d6, d8, d10, d12, d20, d100, and custom dice. Roll multiple dice simultaneously.
Height Calculator
Predict your child's adult height based on parents' heights using the mid-parental height method. Convert height between feet/inches and cm.
Shoe Size Converter
Convert shoe sizes between US, UK, European, and centimeter measurements. Covers men's, women's, and children's shoe sizes.
Roman Numeral Converter
Convert between Roman numerals and standard numbers. Supports numbers 1–3,999. Includes Roman numeral rules and chart.
CPS Test
Free CPS test — measure your clicks per second in 5, 10, 15, or 30 seconds. Kohi-style click speed test for Minecraft PvP, gaming & benchmarking. Instant results.
Online Mirror
Free online mirror — use your phone or laptop camera as a mirror instantly. No download needed. Flip, zoom, brightness control & filters. Works on all devices.
Love Calculator
Calculate your love compatibility score by entering two names. A fun entertainment tool — enter names to get your love percentage and compatibility message.
Horsepower Calculator
Calculate horsepower from torque and RPM (HP = Torque × RPM / 5252). Also convert between HP, kW, and metric PS. Covers mechanical, electrical, and metric HP.
Engine Horsepower Calculator
Estimate engine horsepower using the quarter-mile ET method: HP = Weight / (ET/5.825)^3. Calculate peak power from drag strip elapsed time and vehicle weight.
Molecular Weight Calculator
Calculate the molecular weight (molar mass) of any compound from its chemical formula. Supports all elements using IUPAC atomic weights. Essential for chemistry calculations.
Molarity Calculator
Calculate molarity (M), moles, mass, or volume for any solution. M = moles/L = (mass/MW)/volume. Essential for lab solution preparation and chemistry homework.
Password Generator
Generate secure cryptographically random passwords up to 128 characters. Choose uppercase, lowercase, numbers, symbols. Shows entropy bits and strength rating.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to plain text. Supports UTF-8 and URL-safe Base64 variants. Essential developer tool for data encoding.
URL Encoder / Decoder
Encode special characters in URLs using percent-encoding (RFC 3986) or decode encoded URL strings. Essential for web development, API work, and link sharing.
Time Duration Calculator
Calculate the exact duration between two times — hours, minutes, and seconds. Supports AM/PM and 24-hour formats, overnight durations, and multi-day spans.
Day of the Week Calculator
Find what day of the week any date falls on — past, present, or future. Uses the Zeller formula for accurate results for any date from 1582 to 9999.
Weight Calculator
Calculate weight force (N or lbf) from mass and gravitational acceleration. Convert between mass and weight on Earth, Moon, Mars, and other bodies. W = m × g.
Fuel Cost Calculator
Calculate petrol, diesel or LPG fuel cost for any road trip. Enter distance, fuel efficiency and price per litre or gallon. Multi-stop route planner included. Free fuel calculator.
Time Zone Converter
Convert time zones between 22 major cities with automatic DST handling. Meeting planner mode shows business hours overlap for remote teams. Covers AU, US, UK, EU, Asia. Free tool.
About Our Other Tools
CalcProTool's other tools are designed for users in the USA, UK, Canada, Australia, and Europe. Every calculator uses verified formulas, updates in real time, and requires no registration. All 52 tools in this category are completely free.
Each calculator page includes a full explanation of the formula used, step-by-step guidance, and answers to frequently asked questions. Our tools are designed to help you make informed decisions with confidence.