Free Online Calculators

A free, browser-based toolkit of marketing and everyday calculators. No signup, no watermark, and nothing you enter is stored or sent anywhere.

MARKETING & AD CALCULATORS
SOCIAL MEDIA

Engagement Rate Calculator

Calculate a post or account's engagement rate from likes, comments, and reach — with Instagram, TikTok, and YouTube presets.
AD SPEND

CPM Calculator

Calculate cost-per-thousand-impressions for an ad campaign.
AD SPEND

CPC Calculator

Calculate cost-per-click for a paid ad campaign.
AD SPEND

CPA Calculator

Calculate cost-per-acquisition for a marketing or ad campaign.
CAMPAIGN RESULTS

ROI Calculator

Calculate return on investment for a marketing campaign or general business spend.
EVERYDAY CALCULATORS
MATH

Percentage Calculator

Calculate percentages, percentage change, and percentage increase or decrease.
DATES

Age Calculator

Calculate exact age in years, months, and days from a date of birth.
FINANCE

EMI Calculator

Calculate the monthly EMI (loan installment) for a home, car, or personal loan.