Subtracting numbers in Notion might seem a bit tricky at first, especially if you're more accustomed to traditional spreadsheets like Excel or Google Sheets. But don't worry. It's actually pretty straightforward once you get the hang of it. In this post, we'll walk through how to perform subtraction in Notion, complete with practical examples and tips to make your life easier.
Starting with Notion's Properties
First things first, let's talk about Notion's properties. When you create a database in Notion, you get to define properties for each entry. Think of these properties as the columns in a spreadsheet. They can hold different types of data, like text, numbers, checkboxes, and more. For subtraction, you'll be focusing on number properties.
Here's how you can create a number property:
- Open your Notion database and click on the "+ Add a property" button.
- Choose "Number" as the property type from the dropdown menu.
- Give your property a name, like "Initial Value" or "Subtracted Value".
Once you've created these number properties, you're all set to start using them in calculations. But you might be wondering, "How exactly do I subtract one number from another in Notion?" That's where formulas come in handy.
Formulas: The Magic Behind Subtraction
Formulas in Notion are your best friend when it comes to performing calculations like subtraction. They allow you to manipulate data within your database and create new insights from your existing data. If you have a background in Excel or Google Sheets, you'll feel right at home, as the concept is quite similar.
To kick things off, let's create a formula property in your Notion database:
- Click on "+ Add a property" in your database.
- Select "Formula" from the dropdown menu.
- Name your formula property something like "Difference" or "Remaining Amount".
Now that you've set up your formula property, it's time to write the actual formula to perform subtraction. Let's say you have two number properties named "Initial Value" and "Subtracted Value". To calculate the difference, you would write the following formula:
prop("Initial Value") - prop("Subtracted Value")
And voilla! The formula property will now display the result of the subtraction for each entry in your database. It's that simple.
Using Real-World Examples
Let's put what we've learned into practice with a real-world example. Suppose you're managing a budget for a small project, and you want to track expenses against a total budget. Here's how you can do it in Notion:
- Create a database and add a property named "Total Budget" with the number type.
- Add another property called "Expenses" with the number type as well.
- Finally, create a formula property named "Remaining Budget".
Use this formula to calculate the remaining budget:
prop("Total Budget") - prop("Expenses")
Now, whenever you update the "Expenses" property, the "Remaining Budget" will automatically adjust to show you how much is left. It's a practical way to keep tabs on your finances without having to manually do the math.

Conditional Logic in Subtraction
Notion's formulas also support conditional logic, which can be incredibly useful if you want to make your calculations more dynamic. For example, let's say you want to ensure that the result of your subtraction never goes below zero (because, you know, negative budgets aren't great).
Here's how you can incorporate conditional logic into your subtraction formula:
if(prop("Initial Value") - prop("Subtracted Value") > 0, prop("Initial Value") - prop("Subtracted Value"), 0)
This formula checks if the subtraction result is greater than zero. If it is, it displays the result. If not, it displays zero. It's a handy way to prevent your data from showing negative numbers when they don't make sense in your context.
Subtraction in Task Management
Subtraction isn't just for budgets' it's also great for task management. Let's say you're tracking the progress of a project by monitoring tasks completed versus total tasks. Here's a simple setup:
- Create a database with a property called "Total Tasks" (number type).
- Add another property, "Completed Tasks" (number type).
- Create a formula property named "Tasks Remaining".
Use this formula to calculate how many tasks are left:
prop("Total Tasks") - prop("Completed Tasks")
Every time you update the "Completed Tasks" property, the "Tasks Remaining" property will automatically adjust, giving you an up-to-date snapshot of your project's progress.
Subtraction with Dates
Subtraction in Notion isn't limited to numbers. You can also subtract dates, which is incredibly useful for calculating durations or deadlines. Let's explore an example where you want to track the number of days until a project deadline:
- Create a property named "Deadline" with the date type.
- Add a formula property called "Days Until Deadline".
Here's a formula to calculate the days remaining:
dateBetween(prop("Deadline"), now(), "days")
This formula subtracts the current date from the deadline date and displays the result in days. It's a simple yet effective way to stay on top of important dates.
Formatting Your Subtraction Results
Once you've got your subtraction formulas working, you might want to format the results to make them easier to read or understand. Notion allows you to format number properties in various ways, such as adding currency symbols or adjusting decimal places.
Here's how you can format your subtraction results:
- Select the number property you want to format (such as your formula property).
- Click on the property options (three dots) and choose "Number Format".
- Select the desired format, such as currency, percentage, or a custom format.
By formatting your results, you make your data more presentable and easier to interpret at a glance.
Subtraction and Automation
While Notion is fantastic for manual data entry and formulas, sometimes you want to automate repetitive tasks. That's where tools like Spell can come in handy. Imagine being able to automate the creation of database entries or the updating of properties with AI. Spell can help you achieve this with ease.
For instance, if you frequently update a database with new expenses or tasks, Spell can generate drafts of these entries for you, allowing you to focus on more strategic tasks. It's like having an assistant who handles the data grunt work, so you can concentrate on the bigger picture.


Common Pitfalls and How to Avoid Them
Even though subtraction in Notion is relatively straightforward, there are some common pitfalls you might encounter. Here are a few tips to help you avoid these issues:
- Ensure Property Names Match: Double-check that the property names in your formula match exactly with those in your database. A small typo can lead to errors.
- Check Property Types: Make sure your properties are set to the correct data type. A number property should be used for numeric values, while dates should use the date type.
- Mind the Order of Operations: Remember that Notion formulas follow the standard order of operations (PEMDAS), so use parentheses to clarify the order if needed.
By keeping these tips in mind, you'll be able to troubleshoot and fix most issues that might arise while performing subtraction in Notion.
Taking Subtraction Further with Advanced Formulas
If you're feeling adventurous, you can take subtraction in Notion to the next level by combining it with other functions and operators. For instance, you might want to create a formula that calculates the average difference between two sets of values. Here's a simple example:
(prop("Total Value1") - prop("Value1")) / prop("Total Count") - (prop("Total Value2") - prop("Value2")) / prop("Total Count")
This formula calculates the average difference by subtracting each value from its total and dividing by the total count. It's a bit more complex, but it demonstrates the power and flexibility of Notion's formula capabilities.
Final Thoughts
Subtracting numbers in Notion is a straightforward process once you get the hang of using formulas and properties. Whether you're managing a budget, tracking project progress, or calculating deadlines, Notion's subtraction capabilities can be a valuable asset. And if you're looking to automate some of these tasks, Spell is a great tool to help you save time and streamline your workflow. By leveraging these features, you'll be well-equipped to tackle any subtraction challenge that comes your way in Notion.