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Tool Corner
✦ 170+ tools · always free

Whatever life throws at you,
there’s a tool for that.

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Your everyday toolkit, all in one place. From everyday calculations and conversions to tools for finance, health, education and work — practical tools designed to help you figure things out quickly and confidently.

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170+ free tools · no sign-up · works on any device

Popular tools

6 popular
★ Popular
⚕
BMI Calculator
Body mass index from height & weight
 ★ Popular
◷
Age Calculator
Exact age in years, months, days
 ★ Popular
◈
Loan Calculator
Monthly repayments & interest
 New
◴
EMI Calculator
EMI, schedule and prepayment savings
↗
Compound Interest
Grow your savings over time
 ★ Popular
₤
Salary Calculator
Gross to net, take-home pay
 ★ Popular
◍
Calorie Calculator
Daily calorie & macro needs

Recently added

See all 170+ tools →
New
⊞
Subnet & CIDR Visualiser
Watch a network split, bit by bit
 New
⊻
Logic Gate Simulator
Animated wires and live truth tables
 New
↗
Projectile Motion Simulator
Range, apex and flight time, drawn live
 New
⌾
Pendulum Simulator
Period and frequency, exact and approximate
 New
↓
Free Fall & Terminal Velocity
Watch drag flatten the speed curve
 New
⚖
Seesaw Balance & Torque
Moments each side, and what balances it
 New
◌
Baking Soda & Vinegar
How much fizz, and which runs out first
 New
◑
Why Milk Curdles
Acid and heat against the curdling point
 New
◉
Caramelisation Simulator
The candy ladder, thread to hard crack
 New
○
Egg White Foam Simulator
Peak volume and time to stiff peaks
 New
⚗
The Kitchen & Gut Lab
Mix two foods, see the real reaction
 New
◈
Rent vs Buy Calculator
SIP, lump sum & SWP in one
 New
◈
Mutual Fund Planner
SIP, lump sum & SWP in one
 New
↗
SIP Calculator
Monthly investing maturity value
 New
↘
SWP Calculator
How long will my money last?
 New
▦
Minecraft Build Materials
Blocks, stacks & shulkers for any build
 New
$
Robux to USD
Robux to dollars, pounds and euros
 New
⇆
Roblox DevEx
Cash-out payout after tax and fees

Browse tools

Pick a category to see its tools, or open a category page.

Finance → Health & Fitness → Labs & Simulations → Converters → Maths → Time & Date → Engineering → Everyday → Text & Tools → Fun & Tests → Gaming & Play →
★ Popular
₤
Salary Calculator
Gross to net take-home pay
◔
Tax Calculator
Income tax by band
 ★ Popular
◈
Loan Calculator
Repayments & interest
 ★ Popular
⌂
Mortgage Calculator
Payments & loan-to-value
 New
↧
Mortgage Overpayment
Interest saved and years cut
 New
⌂
Stamp Duty Calculator
SDLT on a property purchase
 New
⌂
LBTT Calculator
Scottish property tax
 New
⌂
LTT Calculator
Welsh property tax
↗
Compound Interest
Grow savings over time
◑
Investment Return
Total & annualised (CAGR)
↘
Inflation Calculator
Value of money over time
 New
%
VAT Calculator
Add or remove VAT
 New
↑
Markup Calculator
Cost to price & margin
◎
Savings Goal
Time to reach a target
 ★ Popular
⚕
BMI Calculator
Body mass index
 ★ Popular
◍
Calorie Calculator
Daily calorie needs
◆
Protein Calculator
Daily protein target
◐
Body Fat Calculator
Estimate body fat %
◇
Water Intake
Daily hydration target
☾
Sleep Calculator
Best bedtimes by sleep cycle
❤
Due Date Calculator
Pregnancy due date
 New
⏱
Running Pace
Pace, speed & race times
◔
Ideal Weight
Healthy weight range
♥
Heart Rate Zones
Training zones by age
 ★ Popular
◷
Age Calculator
Exact age in y/m/d
⇄
Date Difference
Days between dates
◔
Countdown Timer
Live time to an event
◵
Stopwatch
Timing with laps
 New
⧗
Time Duration
Hours & minutes between
☷
Working Days
Business days between dates
↔
Length Converter
m, ft, mi and more
⚖
Weight Converter
kg, lb, oz and more
°
Temperature
°C, °F and K
 New
⇄
Unit Converter
Every converter in one place
▦
Area Converter
m², ft², acres, hectares
◗
Volume Converter
Litres, gallons, cups
➤
Speed Converter
km/h, mph, knots
▤
Data Storage
Bytes, KB, MB, GB, TB
↻
Torque Calculator
Force × distance (N·m)
◎
Pressure Calculator
Pa, bar and psi
⚡
Power Calculator
Watts & horsepower
→
Force Calculator
Newton's second law
◫
Stress Calculator
Force over area (MPa)
 New
◈
LED Resistor
Size the series resistor for an LED
 New
▥
Resistor Colour Code
Decode 4, 5 and 6-band resistors
Ω
Ohm's Law
Volts, amps, ohms, watts
⌐
Beam Load
Reactions & bending moment
⧉
Family Tree Maker
Multiple partners, cousin marriages, PNG & GEDCOM
 ★ Popular
%
Percentage
Percent of, change, difference
◵
Tip Calculator
Tip & split the bill
⛽
Fuel Cost
Cost of any journey
◔
Discount Calculator
Sale price & savings
◊
GPA Calculator
Weighted grade point average
√
Scientific Calculator
Trig, logs, powers & roots
 New
½
Fraction Calculator
Add, subtract, ×, ÷
 New
x̄
Average Calculator
Mean, median, mode
∶
Ratio Calculator
Simplify & solve ratios
Ⅰ
Roman Numerals
Numbers ↔ Roman
 New
◧
Split Bill
Divide a bill with tip
 New
◲
Recipe Scaler
Resize ingredients
⚖
Unit Price
Compare value per unit
✳
Password Generator
Strong random passwords
▦
QR Code Generator
Custom QR codes
Word Counter
Words, chars, reading time
Aa
Case Converter
Change text case
{}
JSON Formatter
Format & validate JSON
⚄
Random Number Generator
Random numbers in any range
 New
⌨
Keyboard Shortcut Trainer
Drill Windows, VS Code and Excel
Ψ
Personality Test
Big Five (OCEAN) analysis
◑
Introvert or Extrovert
Find where you sit
♥
Love Language Quiz
How you give & receive love
◔
Anger Meter
Cool down with a calm-down plan
◕
Stress & Burnout Test
18-question in-depth check
 New
○
Minecraft Circle Generator
Pixel circle charts and block counts
 New
◆
Minecraft Beacon Calculator
Pyramid blocks, range and powers
 New
⏱
Frame Time Calculator
FPS in milliseconds, against your Hz
 New
✧
K/D Ratio Calculator
Kills per death, and what a target costs
 New
◈
Win Rate Calculator
Your percentage, and what a target costs
 New
✦
Gacha Pity Calculator
Real odds, with soft pity modelled
 New
◉
Pokémon Type Calculator
Dual-type damage multipliers
 New
▤
Minecraft Smelting Calculator
Fuel needed and time to smelt
 New
▣
Resolution Scale Calculator
What a render scale really costs
 New
⇄
Sensitivity Converter
Same aim in a different game
 New
◎
eDPI Calculator
True aim speed, and cm/360
 New
★
Fortnite XP
XP per day to hit your level
 New
◊
Nether Portal Calculator
Coordinates and obsidian counts
 New
✦
Minecraft XP Calculator
Levels, points and mob counts
 New
◍
Minecraft Sphere Generator
Spheres and domes, layer by layer
 New
▦
Minecraft Build Materials
Blocks, stacks and shulkers
 New
R$
Robux Tax Calculator
What you keep after the 30% fee
 New
↺
Robux Before-Tax
Price that nets your target
 New
$
Robux to USD
Robux in dollars and pounds
 New
⇆
Roblox DevEx Calculator
Cash-out after tax and fees
⧉
Base64 Converter
Encode & decode Base64
%
URL Encoder
Percent-encode URLs
#
Hash Generator
SHA-1/256/384/512
⎈
UUID Generator
Random v4 UUIDs
◑
Color Converter
HEX, RGB & HSL
◷
Timestamp Converter
Unix epoch ↔ date
Lorem Ipsum
Placeholder text
&
HTML Entities
Escape & unescape HTML
 New
⛟
Auto Loan
Car finance repayments
 New
◉
Personal Loan
Unsecured loan repayments
 New
▭
Credit Card Payoff
Time & interest to clear
 New
◑
Freelance Rate
The day rate your target needs
 New
⇉
Job Offer Comparator
True value of two or three offers
 New
⛨
Emergency Fund Sizer
Your actual months of cover
 New
◫
Debt Snowball vs Avalanche
Which debt to clear first
 New
◍
APR Calculator
True yearly cost of a loan
 New
ⅰ
Simple Interest
Interest without compounding
 New
◵
Retirement
Pension pot projection
 New
↗
ROI Calculator
Return on investment %
 New
◑
Profit Margin
Margin, markup & profit
 New
⚖
Break-Even
Units needed to cover costs
 New
◆
Commission
Sales commission & earnings
 New
◉
BMR Calculator
Basal metabolic rate
 New
◍
TDEE Calculator
Daily energy expenditure
 New
◐
Macro Calculator
Protein, carbs & fat split
 New
=
Basic Calculator
Type a sum, get an answer
 New
x
Algebra Calculator
Solve for x, step by step
 New
x²
Quadratic Equation
Roots, discriminant, vertex
 New
∩
LCM & GCD
Lowest common multiple
 New
ⁿ
Exponents
Powers, roots & logs
 New
◷
Daily Mental Maths
Five games, and how you compare for your age
 New
A
Grade Calculator
Score to percentage & letter
 New
◎
Final Grade
What you need on the exam
 New
⚖
Weighted Grade
Average across weightings
 New
∑
CGPA Calculator
Cumulative grade point average
 New
✓
Test Score
Questions right to grade
 New
▦
Punnett Square
Monohybrid and dihybrid crosses
 New
▬
Concrete Calculator
Volume, bags & weight
 New
◐
Paint Calculator
Litres, tins & coats
 New
▤
Flooring Calculator
Packs, area & waste
 New
▦
Tile Calculator
Tiles, boxes & adhesive
 New
▥
Drywall & Studs
Boards, studs, screws & filler
 New
◠
Compound Interest Simulator
Watch the curve bend as you drag
⊻
Logic Gates
Eleven circuits with live truth tables
⊞
Subnet & CIDR
Slide the mask, watch a network split
↗
Projectile Motion
Range, apex and flight time
⌾
Pendulum
Period against the small-angle rule
↓
Free Fall & Drag
How drag flattens the speed curve
⚖
Seesaw & Torque
Moments, and the distance that balances
⧉
Bayes Test Visualiser
Why a positive result often is not one
Simple on the surface. Carefully built underneath.

Tool Corner tools are developed with care using established formulas, trusted references and research-informed resources where appropriate.

Learn about Tool Corner →

More to explore

From the blog

The pendulum and simple harmonic motion
Why the mass makes no difference — and where the formula breaks.
Subnetting explained: splitting a network by hand
The block-size method, the magic number and VLSM.
Logic gates and boolean algebra
Every circuit ever built can be made from NAND alone.
Kitchen chemistry: four reactions worth understanding
Bicarbonate, curdling, caramel and whipped egg white.
Your due date is a five-week window
Only about 4% of babies arrive on it.
Pace, speed and what a race prediction is worth
Pace goes down as speed goes up.
How much water you actually need
The eight-glasses rule has no study behind it.
Discriminant, GCD and order of operations
Why −3² is −9 and (−3)² is 9.
Pity, K/D and win rate
A 20-game win rate is noise.
Sensitivity, fps and resolution
cm/360 transfers; your slider number does not.
Pressure and flow
Depth sets the pressure, not volume.
Stress, strain and stiffness
Stiffness is not strength.
Force, work, energy and power
Five calculators, one chain of physics.
Macros explained: calories into grams
Why 4, 4 and 9 decide every split.
Base64, URL encoding or hashing?
Two are reversible, one is not, none is encryption.
 View all articles →

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