All Tools & Calculators

Browse all free online calculators and tools from Jobomba. Fast, simple and easy to use.

129 tools
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Age Calculator

Calculate exact age in years, months and days, plus total days and the next birthday.
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Angle Converter

Convert degrees, radians, gradians, turns, and arc units.
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Area Calculator

Area of rectangle, circle, triangle, and other shapes.
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Area Converter

Convert square metres, acres, hectares, square feet, and more.
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Average Calculator

Mean, median, mode, and range for any set of numbers.
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Basal Metabolic Rate Calculator

Compare named equations for estimated resting energy expenditure.
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Base64 Encoder/Decoder

Encode Unicode text or decode standard and URL-safe Base64 locally.
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Birthday Countdown Calculator

See the days until your next birthday, current age, and weekday.
Popular

BMI Calculator

Body Mass Index with healthy weight range, BMR, TDEE, and body fat percentage.
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Body Fat Calculator

Estimate body fat percentage from circumference measurements.
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🇬🇧 Bonus Tax Calculator

How much of your bonus you keep after PAYE deductions.
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Breadcrumb Schema Generator

Generate BreadcrumbList JSON-LD from visible labels and page URLs.
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Business Days Calculator

Count weekdays between two dates with explicit inclusive or elapsed rules.

Calorie Calculator

Daily calorie needs by age, weight, height, and activity level.
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Calories Burned Calculator

Estimate activity energy expenditure from a curated MET table.
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Case Converter for SEO

Convert titles and keyword phrases into publication-ready text cases.
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Colour Converter & Contrast Checker

Convert HEX to RGB and HSL and check WCAG colour contrast.

Compound Interest Calculator

See how savings grow with regular contributions over time.
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🇬🇧 Contractor Day Rate

Annual income equivalent from your daily or hourly rate.
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Cooking Measurement Converter

Convert teaspoons, tablespoons, cups, millilitres, and fluid ounces.
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Countdown Calculator

Count days and whole weeks between a start date and target date.
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Data Storage Converter

Convert bytes, kilobytes, megabytes, gigabytes, and binary units.
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Date Add/Subtract Calculator

Add or subtract years, months, weeks and days with safe month-end handling.
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Day of Year Calculator

Find a date's ordinal day and how many days remain in the year.
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Days Between Dates

Count elapsed or inclusive days between two dates with weeks and calendar differences.
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Diff Checker

Compare two text blocks line by line with added and removed lines.

Due Date Calculator

Estimated pregnancy due date and trimester from your last period.

Emergency Fund Calculator

Build an editable savings buffer from essential costs and circumstances.
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🇬🇧 Employer Cost Calculator

Estimate salary, employer NI, pension, benefits, and total employment cost.
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Energy Converter

Convert joules, calories, kilowatt-hours, BTU, and more.
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FAQ Schema Generator

Generate FAQPage JSON-LD markup from questions and answers.
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Force Converter

Convert newtons, kilonewtons, pound-force, and kilogram-force.
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Fraction Calculator

Add, subtract, multiply, divide, and simplify fractions with working.
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Fuel Economy Converter

Convert MPG, kilometres per litre, and litres per 100 km.
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GCF & LCM Calculator

Find the greatest common factor and least common multiple of integers.
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Google Ads Character Counter

Check responsive search ad headline and description character limits.
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Hash Generator

Generate SHA-256, SHA-1, or MD5 hashes locally from UTF-8 text.
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Heading Tag Analyzer

Extract and review heading hierarchy from pasted HTML.
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Heart Rate Zone Calculator

Compare predicted maximum-heart-rate and heart-rate-reserve training zones.
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🇬🇧 Hourly to Salary Calculator

Convert an hourly rate to annual, monthly, and weekly salary equivalents.
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Hours Calculator

Calculate worked hours from clock-in, clock-out, and unpaid breaks.
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Hreflang Tag Generator

Generate alternate language link tags from language and URL pairs.
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HTML Formatter

Indent and inspect HTML markup locally without executing pasted code.
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Ideal Weight Calculator

Compare four historical height-based weight formulas and limitations.

Inflation Calculator

Real value of money and purchasing power over time.
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JSON Formatter

Format, validate, and beautify JSON data with syntax highlighting.
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JWT Decoder

Inspect JWT headers and payloads locally without implying signature verification.
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Keyword Density Checker

Analyze text content to identify keyword frequency, density, and distribution for SEO optimization.
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Lean Body Mass Calculator

Compare Boer, James, and Hume lean-mass estimates.
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Leap Year Checker

Check Gregorian leap-year status, year length, and the next leap year.

Length Converter

Metres, feet, miles, inches, and kilometres.
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Link Analyzer

Audit links extracted from pasted HTML without crawling a live page.
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Local Business Schema Generator

Generate LocalBusiness JSON-LD structured data in your browser.
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Macro Calculator

Allocate a calorie target across protein, carbohydrate, and fat.
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Markdown Previewer

Preview common Markdown locally with escaped raw HTML and safe links.
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Meta Tag Generator

Generate HTML meta tags including Open Graph and Twitter Cards for better social media sharing and SEO.
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One Rep Max Calculator

Compare established one-repetition-maximum estimates from a submaximal set.
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Open Graph Preview

Preview Open Graph social sharing metadata for a page.
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🇬🇧 Overtime Pay Calculator

Calculate overtime earnings at configurable multipliers (1.5x, 2x, etc.).
Popular

Percentage Calculator

What is X% of Y? Change, increase, decrease, and difference.

Personal Loan Calculator

Monthly cost, total payable, and full APR breakdown.
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Power Converter

Convert watts, kilowatts, horsepower, BTU per hour, and more.
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Powers & Roots

Square roots, cube roots, powers, and natural logarithms.
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Pressure Converter

Convert pascals, bar, psi, atmospheres, and pressure units.
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Prime Factor Calculator

Break a positive or negative whole number into its prime factors.
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Probability Calculator

Calculate simple probability, combinations, and permutations.
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Protein Intake Calculator

See context-based daily protein ranges by body weight and training type.
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Quadratic Equation Solver

Solve quadratic equations with discriminant, roots, and vertex details.
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Random Number Generator

Generate one or more random integers with optional unique values.
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Ratio Calculator

Simplify ratios and find the missing value in a proportion.
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Readability Score Analyzer

Estimate Flesch readability scores, word count, and reading grade from text.
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Recurring Date Calculator

Generate daily, weekly, monthly, or yearly dates with safe calendar rules.
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Regex Tester

Test JavaScript regular expressions with matches, groups, limits, and a timeout.
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Robots.txt Generator

Create robots.txt allow, disallow, and sitemap directives locally.

ROI Calculator

Return on investment as a percentage and net profit.
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Rounding Calculator

Round numbers to decimal places or powers of ten using clear methods.
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Running Pace Calculator

Convert distance and duration into pace, speed, and split estimates.

Savings Goal Calculator

How long until you reach your target with interest added.
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Schema Markup Generator

Generate JSON-LD structured data for various content types to improve search engine visibility.
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Scientific Calculator

Evaluate powers, roots, logarithms, and trigonometric expressions safely.
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SERP Snippet Preview

Preview how your page will appear in Google search results with real-time pixel-width title truncation.
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Sleep Calculator

See age-based sleep-duration guidance and secondary bedtime timings.
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Slope Calculator

Find slope, rise, run, and the line equation from two points.

Speed Converter

mph, km/h, knots, and metres per second.
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SQL Formatter

Format and beautify SQL queries for better readability.
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Standard Deviation Calculator

Calculate population or sample standard deviation, variance, and mean.
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TDEE Calculator

Compare named BMR equations adjusted by transparent activity multipliers.

Temperature Converter

Celsius, Fahrenheit, and Kelvin — instant conversion.
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Text Case Converter

Convert text to upper, lower, title, camel, Pascal, snake, and kebab case.
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Time Card / Timesheet Calculator

Total multiple shifts, breaks, overtime, and optional estimated gross pay.
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Time Duration Calculator

Calculate elapsed hours and minutes for same-day or overnight times.
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Time Unit Converter

Convert seconds, minutes, hours, days, weeks, and years.
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Time Zone Converter

Convert wall-clock times between IANA zones with explicit daylight-saving handling.
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Title Tag Length Checker

Check title-tag character length and get desktop search result guidance.
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🇬🇧 UK Capital Gains Tax Calculator

Calculate UK Capital Gains Tax (CGT) on property, shares, and other assets with annual exempt amount and tax bands.
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🇬🇧 UK Dividend Tax Calculator

Tax on dividends for basic, higher, and additional rate payers.
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🇬🇧 UK Inheritance Tax Calculator

Calculate UK inheritance tax (IHT) with nil-rate bands, residence relief, and gift taper.
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🇬🇧 UK ISA Savings Calculator

Calculate UK ISA savings growth with annual allowance, Cash ISA vs Stocks and Shares ISA comparison, and tax-free projections.
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🇬🇧 UK Maternity & Sick Pay Calculator

Calculate Statutory Maternity Pay (SMP) and Statutory Sick Pay (SSP) entitlements.
Popular

🇬🇧 UK Mortgage Calculator

Monthly repayments, total interest, and LTV — updated for UK rates.

🇬🇧 UK Mortgage Overpayment Calculator

Compare monthly and lump-sum overpayments, interest saved, and time saved.
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🇬🇧 UK Multiple Employment Salary Calculator

Estimate combined take-home pay from two UK jobs with separate tax codes and NI.
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🇬🇧 UK Payslip & Tax Code Checker

Compare expected PAYE, NI, and student loan deductions against your actual payslip.

🇬🇧 UK Pension Calculator

Project your UK pension pot, calculate tax relief, and estimate your State Pension.
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🇬🇧 UK Redundancy Pay Calculator

Calculate statutory redundancy pay based on age, service length, and weekly pay.

🇬🇧 UK Rent vs Buy Calculator

Compare editable renting and buying scenarios over time.

🇬🇧 UK Required Salary Calculator

Estimate the gross salary needed for a chosen take-home amount.
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🇬🇧 UK Salary Calculator

Estimated take-home pay after Income Tax and NI — 2026/27.
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🇬🇧 UK Self-Assessment Tax Estimator

Estimate your Self Assessment tax bill including Income Tax, Class 2 and Class 4 NI.
Updated

🇬🇧 UK Stamp Duty Calculator

UK Stamp Duty on residential and buy-to-let property.
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🇬🇧 UK Student Loan Calculator

Estimate repayments, future balance, potential write-off and overpayment outcomes using 2026/27 thresholds.
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🇬🇧 UK Two Salaries Comparison

Compare take-home pay and deductions for two UK salaries.
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🇬🇧 UK VAT Calculator

Add or remove UK VAT at 20%, 5%, or any custom rate.
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Unix Timestamp Converter

Convert Unix seconds or milliseconds to labelled UTC and local date-times.
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Unix Timestamp Converter for Developers

Convert Unix seconds or milliseconds to UTC and local date-times.
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URL Encoder/Decoder

Encode or decode URL components and complete URLs locally.
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URL Slug Generator

Convert titles and text into SEO-friendly URL slugs with automatic character cleaning.

🇺🇸 US Mortgage Calculator

Monthly payment (PITI), total interest, PMI, and amortization for US home loans.

🇺🇸 US Salary Calculator

Take-home pay after federal tax, FICA, state tax, and 401(k) — 2024.
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UUID Generator

Generate secure UUID v4 identifiers individually or in batches.
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Volume Converter

Convert metric, UK imperial and US liquid volume units accurately.
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Water Intake

Daily hydration target based on bodyweight and activity.
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Week Number Calculator

Find the ISO week number, week-year, and weekday for any date.

Weight Converter

Kilograms, pounds, stone, and ounces.

Weight Loss Calculator

Calculate weight loss goals, calorie deficit, and time to reach target weight.
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Word Counter with SEO Metrics

Count words, characters, sentences, reading time, and keyword use.
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XML Formatter

Format and validate XML locally with DTD and entity declarations blocked.
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XML Sitemap Generator

Generate an XML sitemap from a list of absolute page URLs.
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YouTube Tag Generator

Generate relevant video tag ideas from supplied topics and terms.