Blog
Tips, guides, and how-to articles to help you get the most out of our calculators.
Getting Started with Calcr.xyz
Learn how to use Calcr.xyz calculators and find the perfect tool for your needs.
Percentage Calculator: 3 Ways to Calculate Percentages
Calculate percentages three ways: what is X% of Y, X is what % of Y, and percentage change. Includes VAT calculator for South Africa and discount calculator.
Retirement Calculator: How Much Do You Need to Save?
Find out how much you need to retire comfortably. Our free retirement savings calculator accounts for inflation, investment returns and monthly income needs.
Unit Conversion Guide: Metric to Imperial Made Simple
Convert between metric and imperial units instantly. Complete guide to length, weight, volume and temperature conversions with formulas and everyday examples.
BMR Calculator: Your Basal Metabolic Rate Explained
Calculate your Basal Metabolic Rate — the calories your body burns at rest. Understand what affects your metabolism and how to use BMR for weight management.
How Much Water Should You Drink Per Day?
Find your personalised daily water intake based on weight, activity level and climate. Free water intake calculator with hydration tips for South African conditions.
Loan Calculator: What Will Your Monthly Instalment Be?
Calculate your exact monthly loan repayment, total interest, and see how different terms affect total cost. Free calculator for personal, car and student loans.
Tip Calculator: How Much to Tip and How to Split a Bill
Calculate the perfect tip and split a restaurant bill any number of ways. Free tip calculator with quick-select percentages, any currency, and per-person breakdown.
Fuel Cost Calculator: How Much Will Your Trip Cost?
Calculate the exact fuel cost for any trip using distance, fuel efficiency and current petrol prices. Works in L/100km and MPG with any currency including ZAR.
How Many Calories Do You Need Per Day? TDEE Explained
Find out your Total Daily Energy Expenditure (TDEE) and how many calories you need to maintain, lose or gain weight. Free calculator with macro breakdown included.
ROI Calculator: How to Calculate Your Return on Investment
Learn how to calculate return on investment (ROI) accurately. Includes the formula, real examples for property and stocks, and a free online ROI calculator.
Celsius to Fahrenheit: The Complete Temperature Conversion Guide
Convert temperature between Celsius, Fahrenheit and Kelvin instantly. Includes conversion formulas, common reference temperatures, and a free online converter.
Recipe Scaler: How to Scale Any Recipe Up or Down
Learn how to scale recipes for more or fewer servings accurately. Our free recipe scaler calculator handles fractions automatically and preserves all ingredient names.
BMI Calculator: What Your Number Actually Means
Calculate your Body Mass Index and understand what it means for your health. Includes healthy weight ranges, BMI categories explained, and important limitations.
Mortgage Calculator: Know Your Exact Monthly Repayment
Calculate your exact monthly mortgage or bond repayment, total interest paid, and see a full amortisation schedule. Free calculator supporting USD, ZAR, GBP and EUR.
Compound Interest Calculator: How Your Money Really Grows
Use our free compound interest calculator to see exactly how your savings grow year by year. Includes the formula, real examples with numbers, and tips to maximise your returns.