The Dekuz guides explain the ideas behind our calculators and converters in plain language. Each guide starts with a question that people really ask, such as how many grams are in a tola, how a loan payment is calculated or what the difference is between markup and margin, and then answers it with the exact formula, a worked example with real numbers, a table you can reuse, a list of common mistakes and a short set of frequently asked questions.
We write for ordinary readers. Terms are explained the first time they appear, examples are checked by hand, and we say clearly when a rule varies between countries, banks, schools of thought or traditions. The figures in examples are illustrations that show the method. They are not current prices, and they are not financial, legal, medical or religious advice. Every guide links to the tools that perform the calculation, so you can try your own numbers right away.
All guides
How Many Grams in a Tola? Tola, Masha and Ratti Explained
One tola is 11.6638 grams, but the story does not end there. This guide explains the tola, masha and ratti system, shows a conversion table from one ratti to ten tola, compares 24, 22, 21 and 18 karat gold, and walks through turning a price per tola into a price per gram. It also covers the weights used for zakat nisab, why some shops round the tola, and a checklist for buying gold with a proper invoice. Read it before your next jewellery purchase.
Marla to Square Feet and Kanal Conversion Guide for Pakistan
A marla is 272.25 square feet in revenue records and 225 square feet in many housing societies, and the difference can change the price of a plot by more than a million. This guide sets out the marla, kanal, gaz and acre relationships, gives tables in square feet, square yards and square metres, and shows a worked price example. It also explains plot area against covered area and lists the documents to check before you pay.
How to Calculate Loan EMI: Formula, Worked Example and Tips
Learn how an equated monthly instalment is built from the loan amount, the monthly rate and the number of payments. A full example borrows 500,000 for 36 months at 12 percent, shows the first three months of interest and principal, compares terms from 24 to 60 months, and contrasts a flat rate with a reducing balance rate. You will also find the fees to ask about and practical ways to lower the cost of a loan.
How to Calculate Zakat on Gold, Silver and Savings: A Step-by-Step Guide
A calm, step-by-step explanation of the zakat arithmetic: the 2.5 percent rate, the nisab of 87.48 grams of gold or 612.36 grams of silver, which assets are counted and which debts can be subtracted. A worked example shows how the same family can owe 28,750 on the silver basis and nothing on the gold basis, which is why the guide repeatedly points readers to a qualified scholar for rulings.
Markup vs Margin: How to Price a Product and Protect Your Profit
Markup is profit on cost and margin is profit on price, and confusing them quietly erodes earnings. This guide gives both formulas, a conversion table, and an example where a 30 percent markup produces only a 23 percent margin. It shows how to price for a target margin, how a 20 percent discount can halve profit, how tax and fees distort the picture and how break-even volume links it all together.
How to Convert CGPA to Percentage in Pakistan: The HEC Formula Explained
Students in Pakistan are often asked for a percentage when their transcript shows a CGPA. This guide explains the banded HEC conversion formula for the 4.0 and 5.0 scales, walks through the method step by step, lists common values such as 3.5 CGPA = 86.76 percent, shows the reverse conversion and explains why dividing by four gives a different answer. It also covers the 10-point scale and the mistakes that cost marks in merit lists.
Why we publish guides
Calculators answer the question that you type into them, but they cannot explain why a number looks the way it does or which input you should doubt. A guide fills that gap. When you understand how a tola relates to a masha, why a marla has two sizes, how an EMI divides into interest and principal, what the nisab is based on or why a margin is smaller than a markup, you can check any result yourself and you are much less likely to make an expensive mistake. Each guide was written around one question that people really search for, and each is connected to the tools that do the arithmetic, so that you can move from reading to calculating in one click.
How to use a guide together with a tool
A good routine is to read the guide once, then open the linked calculator and re-create the worked example with the same numbers. If the tool reproduces the figure in the guide, you know that you are using it correctly. Then replace the example with your own values and compare the result with a rough estimate. The guides also list common mistakes and a short set of frequently asked questions, which you can scan again whenever you return to the tool. If you ever find that a tool and a guide disagree, please tell us through the contact page, because that is exactly the kind of error that we want to fix.
Who the guides are for
The guides are written for ordinary readers who have a practical question and want a clear answer without jargon. A family that is comparing jewellery shops, a buyer who is reading a plot advertisement, a borrower who is looking at a loan offer, a Muslim who wants to organise the figures for zakat, and a small seller who is setting prices will each find a guide that starts from their situation. Students can use the worked examples as practice problems, and teachers are welcome to link to a guide in a lesson. Because every guide uses plain language, readers who are more comfortable in another language can also use a translation tool on a single paragraph without losing the numbers.
How we check the numbers
Every number in a guide is checked with an independent calculation before the page is published. Definitions come from standard sources, such as the exact inch of 2.54 centimetres or the troy ounce of 31.1035 grams. When a value depends on a convention, for example the size of a marla, the nisab that a school of thought uses or the way a bank counts interest, we say so and show the alternatives instead of choosing one silently. Prices and rates in examples are always labelled as illustrations. Dekuz does not publish live gold, silver, currency or property prices, because they change every day and an outdated price is worse than no price.
Topics we may cover next
We choose new topics from the questions that visitors send and from the tools that are used most. Subjects that we may cover include percentage increase and decrease explained, how to calculate compound interest and savings goals, how to convert recipe measurements, how to count business days between two dates, how to calculate your age exactly, and a plain-language guide to loan comparison. If you would like to see a particular topic, or if you can point to a rule that varies in your country, please write to us. Reader suggestions have a real influence on what we write next.
What the guides do not do
The guides are educational. They are not financial, tax, legal, medical or religious advice, and they cannot replace a bank, an accountant, a lawyer, a doctor or a qualified scholar. Rules differ between countries, institutions and traditions, and they change over time. The examples show a method and use made-up amounts. Before you act on a decision that involves a large sum of money, your health, your legal rights or a religious duty, please confirm the details with a professional or an official source. The Disclaimer page explains these limits in more detail, and each guide ends with a short reminder.
Corrections, updates and your feedback
Guides are living documents. When a definition changes, a reader finds a mistake or we find a clearer way to explain an idea, we edit the guide and update the date at the top of the page. Please tell us if something is unclear, wrong or missing. The most useful messages quote the sentence that caused the problem, explain what you expected and name the source that you trust. We read every message, and we thank everyone who helps us make the guides more accurate.
How we write and update guides
Before a guide is published we check each number against a published definition or a hand calculation, and we avoid claims that we cannot support. When a rule changes, or a reader points out a mistake or an unclear passage, we revise the guide and change the date at the top. If you have a topic that you would like us to cover, or a correction, please use the Contact page. You can also browse every calculator on the All Tools page.