The Notes Calculator Blog
Calculator guides & deep dives
Practical math, written like a friend explaining it over coffee. Every post comes with an embedded calculator you can use right in the browser.
All posts
10–18 of 21
-
Free Tip Calculator: Calculate Tips & Split the Bill
Free tip calculator to figure out how much to tip at restaurants. Calculate tip amount, total bill, and split between any number of people instantly.
-
Free Discount Calculator: Find the Sale Price Instantly
Free discount calculator to find the final sale price after any percentage off. Calculate savings, compare deals, and understand stacking discounts.
-
Free Loan Payment Calculator: Monthly Payment & Interest
Free loan payment calculator for mortgages, car loans, and personal loans. Enter loan amount, interest rate, and term to calculate monthly payments and total interest.
-
Free Unit Converter: Length, Weight, Temperature & Volume
Free unit converter for length, weight, temperature, and volume. Convert between metric and imperial units instantly with formulas and conversion tables.
-
Free Profit Margin Calculator: Margin, Markup & Profit
Free profit margin calculator. Enter cost and revenue to calculate profit margin percentage, markup percentage, and gross profit. Includes margin vs markup explained.
-
Free Compound Interest Calculator: See Your Money Grow
Free compound interest calculator with formula breakdown. Enter principal, rate, and time to see how your savings and investments grow with compound interest.
-
Free Freelancer Invoice Calculator: Hours, Rates & Tax
Free freelancer invoice calculator. Enter your hourly rate, hours worked, and tax rate to calculate project totals, subtotals, and tax for client invoices.
-
Free GPA Calculator: Calculate Your Grade Point Average
Free GPA calculator using the standard 4.0 scale. Enter your letter grades and credit hours to calculate semester and cumulative grade point average.
-
Free BMI Calculator: Check Your Body Mass Index
Free online BMI calculator for adults. Enter your height and weight to calculate Body Mass Index, check your weight category, and understand your results.
Stop calculating in your head.
Every guide on this blog comes with a calculator you can use immediately. Or grab the full app — free on every platform.
Free forever plan · No credit card · Cross-platform