TK ToolKit Online
Directory

All tools (108)

Every calculator, converter and text tool on ToolKit Online, grouped by category.

Finance & Loans (12)

Finance page →
Loan CalculatorThe Loan Calculator helps you understand exactly what a fixed-rate loan costs before you sign anythi…Mortgage CalculatorA mortgage payment is more than principal and interest. This Mortgage Calculator combines the loan i…Auto Loan CalculatorThis Auto Loan Calculator models a real dealership deal. It starts from the vehicle price, subtracts…Compound Interest CalculatorCompound interest is the engine behind long-term wealth: interest is earned not only on your origina…Savings CalculatorThe Savings Calculator answers the two questions savers actually ask: how long will my goal take, an…Retirement CalculatorThis Retirement Calculator turns your current age, savings and monthly contributions into a projecte…Investment Return CalculatorThe Investment Return Calculator converts what you put in and what you have now into the numbers tha…Tip CalculatorThe Tip Calculator removes the awkward mental maths at the end of a meal. Enter the bill, choose a t…Sales Tax CalculatorThe Sales Tax Calculator works in both directions. In "add tax" mode it takes a pre-tax price and re…Monthly Budget CalculatorA budget works because it makes trade-offs visible. This Monthly Budget Calculator lays out the comm…Credit Card Payoff CalculatorRevolving credit is the most expensive way to borrow, and minimum payments are designed to keep bala…Net Worth CalculatorNet worth is the single number that summarises your financial position: everything you own minus eve…

Date & Time (19)

Date page →
Age CalculatorThis Age Calculator converts a date of birth into a precise age down to the day. Instead of only tel…Date CalculatorThe Date Calculator answers questions such as "what date is 90 days from now?" or "what was the date…Days Between Dates CalculatorThe Days Between Dates Calculator measures the gap between two calendar dates. Enter a start and an …Business Days CalculatorThe Business Days Calculator counts only Monday-to-Friday days between two dates, and lets you subtr…Weekday FinderThe Weekday Finder tells you instantly which day of the week any date falls on - whether it is a bir…Countdown Date CalculatorThe Countdown Date Calculator turns any future date into a live, second-by-second countdown. Enter t…Time Duration CalculatorThe Time Duration Calculator measures how much time passes between two timestamps. Enter a start and…Age In Months CalculatorThe Age In Months Calculator expresses an age purely in months rather than years, which is exactly w…Working Days CalculatorThe Working Days Calculator is the flexible version of a business-days counter. Instead of assuming …Leap Year CheckerThe Leap Year Checker tells you whether a given year has 366 days, and explains why. A year is a lea…Sleep Cycle CalculatorSleep runs in roughly 90-minute cycles, alternating between light sleep, deep sleep and REM. Waking …Shift Work Hours CalculatorShift work rarely fits the tidy 9-5 / 40-hour model: nurses work three 12-hour shifts and a 4, secur…Overtime Pay CalculatorOvertime pay is straightforward in principle: any hour above 40 in a week is paid at 1.5x (or 2x pas…Time Zone Meeting PlannerThe Time Zone Meeting Planner answers the only question that matters when scheduling across time zon…Work Week CalculatorA project that ends in three weeks is six, eight or fifteen workdays depending on which days are wee…Vacation Day CalculatorVacation day policies are not all the same: some give 20 days a year on day one, others accrue 1.67 …Hours Between Two Times CalculatorThe Hours Between Two Times Calculator is the everyday cousin of the duration calculator: type a sta…Week Number FinderThe Week Number Finder answers three questions: which week of the year is this, which day of the yea…Time Card CalculatorA time card is a list of clock-in and clock-out pairs. The Time Card Calculator accepts a line per d…

Text & Writing (22)

Text page →
Word CounterThe Word Counter analyses whatever you paste and updates every statistic as you type: total words, c…Character CounterThe Character Counter is built for limits. Set a target length - 280 for a tweet, 160 for an SMS, 2,…Case ConverterThe Case Converter rewrites text into every casing style you are likely to need: UPPER CASE, lower c…Random Word GeneratorThe Random Word Generator produces random English words on demand. Choose how many you need, filter …Password GeneratorThis Password Generator builds passwords from the character sets you choose: upper case, lower case,…UUID GeneratorThe UUID Generator produces RFC 4122 version 4 identifiers - the 36-character strings developers use…Lorem Ipsum GeneratorThe Lorem Ipsum Generator creates the filler text designers have used since the sixteenth century. C…Remove Duplicate Lines ToolThe Remove Duplicate Lines Tool cleans messy lists. Paste a column of emails, keywords, IDs or any l…Sort Text AlphabeticallyThe Sort Text Alphabetically tool puts any list in order. Paste words, names, keywords or lines of c…Reverse Text GeneratorThe Reverse Text Generator flips text in four different ways: reverse every character (including the…Text To ASCII ConverterThe Text To ASCII Converter translates in both directions. Enter normal text and receive the numeric…Email ValidatorThe Email Validator checks an address the way a careful mail server would: it verifies the overall s…Line Break RemoverPasted text is rarely paste-ready. Copy a column from a spreadsheet or a wrapped paragraph from a PD…Text Line CounterA line counter is the tool every developer and editor reaches for at some point. Paste a log file, a…Indent Remover For Plain TextCode and pasted text often arrive with unwanted indentation: a Python snippet copied from an email g…Vowel CounterThe Vowel Counter tells you how many vowels are in a passage, which ones dominate, and what share of…Consonant CounterThe Consonant Counter is the mirror image of the vowel counter: it counts the letters of the alphabe…Syllable Counter For English TextEnglish syllable counting is famously irregular - "fire" is one syllable, "hour" is one, "every" is …Reading Level CheckerReadability formulas turn a passage into a grade level. The Reading Level Checker computes the four …Plain Text CleanerText harvested from the web is rarely clean. The Plain Text Cleaner removes the noise in one pass: U…Character Frequency CounterThe Character Frequency Counter builds a histogram of every character in a passage: letters, digits,…Random Sentence GeneratorThe Random Sentence Generator builds complete English sentences from a vocabulary of subjects, verbs…

Converters & Units (14)

Converters page →
Cm to Inches ConverterUse this Cm to Inches Converter whenever you need to move between the metric and imperial length sys…Inches to Cm ConverterThis Inches to Cm Converter handles imperial to metric length in both directions. Enter inches to se…Lbs to Kg ConverterThe Lbs to Kg Converter switches between the imperial pound and the metric kilogram in either direct…Kg to Lbs ConverterThe Kg to Lbs Converter turns metric weights into pounds and back again. Edit either field and the o…Miles to Km ConverterThe Miles to Km Converter covers the distance conversion travellers need most. Enter miles to see ki…Km to Miles ConverterThe Km to Miles Converter converts metric distances into miles and back again. Type in either box an…Fahrenheit to Celsius ConverterThe Fahrenheit to Celsius Converter handles the temperature conversion people look up most often. En…Celsius to Fahrenheit ConverterThe Celsius to Fahrenheit Converter converts metric temperatures into the Fahrenheit scale used main…Gallons to Liters ConverterThe Gallons to Liters Converter converts US liquid gallons into liters and back again. Edit either f…Ounces to Grams ConverterThe Ounces to Grams Converter handles the weight unit used in most US recipes. Type ounces to see gr…Square Feet to Acres ConverterThe Square Feet to Acres Converter translates between the two area units used most in US property li…Mb to Gb ConverterThe MB to GB Converter converts digital storage sizes in both directions. Type megabytes to see giga…Bytes to Kb ConverterThe Bytes to KB Converter converts raw byte counts into kilobytes and back again. Enter either value…Pixels to Inches ConverterThe Pixels to Inches Converter turns a pixel dimension into a real-world physical size. Because pixe…

Math & Study (8)

Math page →
Percentage CalculatorThe Percentage Calculator handles the two questions people ask most often. The first panel answers "…Percentage Increase CalculatorThis Percentage Increase Calculator does two related jobs. The first panel computes the percentage c…Fraction CalculatorThe Fraction Calculator does the arithmetic that is easy to get wrong by hand. Enter two fractions a…GPA CalculatorThe GPA Calculator turns a list of courses into a grade point average on the 4.0 scale. Add a row fo…Grade CalculatorThe Grade Calculator answers the end-of-term question: what do I need on the final? Enter your curre…Average CalculatorThe Average Calculator takes a list of numbers and returns the statistics that matter: count, sum, m…Random Number GeneratorThe Random Number Generator produces numbers between a minimum and a maximum you choose. Pick how ma…Multiplication Table GeneratorThe Multiplication Table Generator builds a times table for any number you choose, over any range. S…

Health & Body (5)

Health page →
BMI CalculatorThis BMI Calculator works out your body mass index from your height and weight, in either metric or …Calorie CalculatorThe Calorie Calculator estimates how many calories you burn per day using the Mifflin-St Jeor equati…Body Fat CalculatorThe Body Fat Calculator uses the US Navy circumference method, which estimates body fat percentage f…Ideal Weight CalculatorThe Ideal Weight Calculator shows what several established formulas say a healthy weight is for your…Pregnancy Due Date CalculatorThis Pregnancy Due Date Calculator estimates your estimated delivery date (EDD) using Naegele's rule…

Student & Education (9)

Student page →
Semester GPA CalculatorThe Semester GPA Calculator focuses on a single term. Enter each course, the credit hours it carries…Weighted Grade CalculatorA class grade is almost never a straight average. Most courses weight homework at 10%, quizzes at 20…College Credit Hour CalculatorThe College Credit Hour Calculator answers two questions every undergraduate asks: how far along am …High School GPA ConverterHigh schools use different scales and universities compare students across them, so a 90% in one sys…Test Score Percentage CalculatorThe Test Score Percentage Calculator does what the bottom of every graded paper does: divides the nu…Reading Time CalculatorThe Reading Time Calculator turns a word count into a duration. The average adult reads prose at 200…Essay Word Count EstimatorMost academic essays come with two numbers: a word limit and a page count. The Essay Word Count Esti…Study Hours CalculatorKnowing what to study is hard enough. The Study Hours Calculator tackles the logistics: how many hou…Exam Pass Probability CalculatorA pass-probability calculator treats your exam score as a draw from a normal distribution. Your past…

Home & Construction (10)

Home page →
Paint Coverage CalculatorA can of paint looks expensive until you realise how far it goes. Most interior latex covers about 3…Wallpaper Quantity CalculatorWallpaper rolls come in fixed sizes (usually 33 ft × 21 inches in the US, 10 m × 53 cm in the UK) an…Flooring Square Foot CalculatorFlooring is sold by the box, and every box covers a fixed number of square feet. The Flooring Square…Deck Material EstimatorA deck is mostly lumber, fasteners and concrete, and getting the order right saves a return trip to …Tile Grout CalculatorA bag of grout covers a known volume of joint, and the volume of joint depends on the tile size, the…Cubic Yards Calculator For MulchMulch is sold by the cubic yard in bulk and by the bag (2 cu ft) at the garden centre. The Cubic Yar…Concrete Volume CalculatorA short pour on a Saturday needs three things measured: length, width and thickness. The Concrete Vo…Board Foot CalculatorA board foot is the unit lumber is sold in: 144 cubic inches, equivalent to a 12 in × 12 in × 1 in b…Roof Pitch CalculatorA roof is described by its pitch, the inches of rise per foot of run. The Roof Pitch Calculator acce…Window Energy Savings EstimatorReplacing single-pane or old double-pane windows is one of the more expensive home upgrades, but the…

Business & Freelance (9)

Business page →
Hourly Rate Calculator For FreelancersFreelancing is mostly a division problem: divide the income you need by the hours you can actually b…Billable Hours CalculatorA billable hours calculator answers two questions: how much should I invoice for this project, and h…Markup Calculator vs Margin CalculatorMarkup and margin are not the same. A 50% markup on a $20 item gives a $30 selling price and a 33% m…Break Even Point CalculatorA break-even point is the units or revenue at which revenue equals total cost - the moment you stop …Quarterly Estimated Tax CalculatorFreelancers and sole proprietors do not have an employer withholding their taxes, so the IRS expects…Receipt Tax CalculatorA receipt is just a number once you add the tax, an optional tip, and split it across a few diners. …Business Profit Margin CalculatorProfit margin is the share of revenue you keep after costs. The Business Profit Margin Calculator ta…Time Tracking Hours CalculatorTime tracking is the most-hated part of freelancing and the part that wins or loses you money. The T…Invoice Due Date CalculatorThe Invoice Due Date Calculator accepts an invoice date and standard payment terms, then returns the…