Limit-up formula
Limit-up price = reference price × (1 + limit percentage ÷ 100). For 100 at 10%, the estimate is 110.
Stock Limit-Up and Limit-Down Price Calculator
Calculate theoretical limit-up and limit-down prices from a reference price and a custom price-limit percentage.
Stock limit price calculator
Enter a percentage between 0 and 100.
This is a mathematical estimate. Tick-size rounding, fees, taxes, exchange rules, and special price-limit policies are not applied.
What is a stock limit price calculator?
A stock limit price calculator estimates the upper and lower price boundaries from a reference price and a market limit percentage. It keeps both sides of the calculation together so you can compare the possible limit-up and limit-down prices quickly.
Both prices togetherSee theoretical limit-up and limit-down prices from the same reference value.
Custom percentageUse the rate that applies to your market or scenario instead of a hard-coded rule.
Transparent formulasThe result shows the calculation logic so it is easy to verify.
Runs locallyThe calculation happens in your browser without sending input to a server.
How to calculate limit-up and limit-down prices
1
Enter the reference price
Use the relevant previous close, base price, or other reference value.
2
Enter the limit percentage
Type the percentage as a number, such as 10 for a 10% limit.
3
Calculate both boundaries
Select Calculate to display the theoretical upper and lower prices.
4
Check the official rule
Confirm exchange rounding, tick size, and special restrictions before using the estimate.
Formula and usage notes
Limit-down formula
Limit-down price = reference price × (1 − limit percentage ÷ 100). For 100 at 10%, the estimate is 90.
Why can the traded price differ?
Exchanges may apply minimum tick sizes, rounding conventions, special listing rules, or different limits for a specific security.
Which percentage should I use?
Use the official percentage for the market and security you are checking. The tool does not identify that rule automatically.
Frequently Asked Questions
How do I calculate a stock limit-up price?
Multiply the reference price by 1 plus the limit percentage. For a reference price of 100 and a 10% limit, the theoretical limit-up price is 110.
How do I calculate a stock limit-down price?
Multiply the reference price by 1 minus the limit percentage. For a reference price of 100 and a 10% limit, the theoretical limit-down price is 90.
Can I use this for every stock market?
You can use it for the mathematical calculation, but you must enter the correct rate and confirm the exchange's own tick-size and rounding rules.
Does the calculator include fees or taxes?
No. It calculates price boundaries only and does not include commissions, taxes, slippage, or order-book execution.
Is my input uploaded?
No. The calculation runs locally in your browser and the entered values are not sent to the server by this tool.