All Tools

Calculate Return on Ad Spend from your ad spend and revenue.

Calculate cost per 1,000 impressions (CPM) for your ad campaign.

Calculate cost per click (CPC) from ad spend and clicks.

Calculate click-through rate (CTR) from impressions and clicks.

Calculate the percentage of visitors who completed a goal.

Calculate how much it costs to acquire one new customer.

Estimate the total revenue a customer generates over their lifetime.

Calculate markup percentage from cost and selling price.

Calculate commission earned on a sale amount.

Add line items, discount and tax to calculate an invoice total.

Calculate the true total cost of employing someone.

Calculate the hourly rate you need to charge as a freelancer.

Calculate monthly cash burn and how long your runway will last.

Calculate percentages quickly and for free.

Convert length, weight, and temperature units instantly, for free.

Find the percentage change between two numbers.

Calculate exact age in years, months and days.

Find the number of years, months and days between two dates.

Count business days between two dates, excluding weekends and holidays.

Work out the tip and total for a bill in seconds.

Split any bill evenly between friends, with an optional tip.

Find the sale price and savings for any discount.

Add or remove VAT/sales tax from any price.

Estimate monthly payments and total interest on a loan.

See how an investment grows with compound interest over time.

Calculate return on investment as a percentage.

Calculate profit and profit margin from revenue and cost.

Find how many units you need to sell to break even.

Calculate your Body Mass Index from height and weight.

Estimate your daily calorie needs to maintain, lose or gain weight.

Calculate running or walking pace and speed from distance and time.

Compare two products to find which is cheaper per unit.

Simplify a ratio or solve for a missing value in a proportion.

Calculate mean, median, mode and range from a list of numbers.

Add, subtract, multiply or divide two fractions.

Find the complementary color for any hex color.

Generate a harmonious analogous color scheme from any base color.

Generate a balanced triadic color scheme from any base color.

Generate a random 5-color palette with one click.

Create a two-color CSS gradient and copy the code instantly.

Check WCAG contrast ratio between text and background colors.

Generate tints and shades of any base color.

Generate random hex and RGB colors with one click.

Preview how a color looks with protanopia, deuteranopia or tritanopia.

Convert any hex or RGB color to CMYK for print.

Find the closest named color match for any hex code.

Format, validate and beautify JSON for free.

Test JavaScript regular expressions against text for free, with live highlighting.

Convert Excel or CSV rows into ready-to-run SQL INSERT statements for free.

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes for free.

Generate and verify a 32-character MD5 checksum from text in your browser.

Generate a SHA-256 hash from text, for free.

Encode text or strings to Base64 instantly and for free.

Decode Base64 strings back to readable text instantly.

Percent-encode text or URLs instantly and for free.

Decode percent-encoded URLs and text instantly.

Escape text to safe HTML entities instantly and for free.

Decode HTML entities like & and < back into readable text.

Encode or decode text with the classic ROT13 letter-substitution cipher.

Translate text to Morse code and Morse code back to text, instantly.