Dexcom sensor wear time varies by model. The Dexcom G6 is designed for up to 10 days, the standard Dexcom G7 for up to 10 days plus a 12-hour grace period, and the Dexcom G7 15 Day for up to 15 days plus a 12-hour grace period.
A sensor may stop earlier because of issues such as accidental removal, adhesion problems, or a sensor-related issue. If that happens, follow the product instructions and contact the manufacturer for support when appropriate.
This guide breaks down the expected lifespan of each model, explains the Dexcom grace period, covers common reasons a sensor may end early, and shares practical tips for planning your next replacement.
How Long Do Dexcom Sensors Last?
Dexcom sensor lifespan depends on the specific model you’re using.
| Dexcom Sensor | Intended Wear Time | Grace Period |
| Dexcom G6 | Up to 10 days | — |
| Dexcom G7 | Up to 10 days | 12 hours |
| Dexcom G7 15 Day | Up to 15 days | 12 hours |
The standard G7 and G7 15 Day have different intended wear periods, so it is important to check the exact model rather than assuming all Dexcom sensors last the same amount of time.
How Long Does a Dexcom G6 Sensor Last?
A Dexcom G6 sensor is designed to provide glucose readings for up to 10 days. After the sensor session ends, a new sensor is required.
One important point is that sensor life and transmitter life are different.
The G6 uses a separate transmitter, while the sensor is the component replaced after its intended sensor session. Therefore, you shouldn’t use the transmitter’s expected lifespan to determine how long an individual sensor can be worn.
What this means for planning
If you’re using G6 supplies, think in terms of individual 10-day sensor sessions when planning your replacement supplies.
However, Dexcom announced that G6 manufacturing would end after July 1, 2026. Supplies may remain available for some time afterward, but Dexcom does not guarantee availability beyond that date.
How Long Does a Dexcom G7 Sensor Last?
The standard Dexcom G7 sensor is designed for up to 10 days of wear, followed by a 12-hour grace period.
The grace period gives users additional time to replace the sensor when it is convenient.
It does not mean that the sensor has another complete sensor session after the original 10-day period.
Dexcom states that the G7 sensor cannot be restarted after the sensor session has ended.
How Long Does the Dexcom G7 15 Day Sensor Last?
The Dexcom G7 15 Day is different from the standard G7.
It is designed for up to 15 days of wear, followed by a 12-hour grace period.
This means you should not automatically assume that a product labeled “Dexcom G7” has a 15-day wear period.
Standard G7 vs. G7 15 Day
- G7: up to 10 days + 12-hour grace period
- G7 15 Day: up to 15 days + 12-hour grace period
The exact model should therefore be checked before purchasing replacement supplies.
What Is the Dexcom Grace Period?
The grace period is additional time provided at the end of the sensor session.
For the standard G7, Dexcom provides a 12-hour grace period after the 10-day sensor session. The G7 15 Day provides a 12-hour grace period after its 15-day session.
For example, if a standard G7 reaches the end of its 10-day session, the grace period provides additional time to replace the sensor.
Dexcom explains that the grace period is intended to give users more flexibility when changing sensors.
Remember
The grace period shouldn’t be treated as an extra full sensor cycle.
The grace period provides additional time to replace the sensor; it does not change the sensor’s stated wear period.
Why Might a Dexcom Sensor Stop Working Early?
Although sensors are designed for a specific wear period, an individual sensor may stop working before that period is complete.
Possible reasons include:
- Sensor-related issues
- Application problems
- Adhesion problems
- Accidental removal
- Physical damage
- Other circumstances affecting the sensor session
Dexcom specifically provides support for situations where a sensor session ends prematurely.
If you believe a sensor has stopped working unexpectedly, follow the manufacturer’s instructions and contact Dexcom Product Support when appropriate.
How Can You Help a Sensor Stay in Place?
Proper application can help reduce avoidable adhesion problems.
Dexcom recommends using the overpatch included with the G7 sensor and following the product’s insertion instructions carefully.
Some useful habits include:
- Follow the insertion instructions for your specific sensor.
- Use the recommended insertion location.
- Prepare the application area according to the product instructions.
- Apply the included overpatch when applicable.
- Avoid unnecessary pulling or friction around the sensor.
- Follow the manufacturer’s care instructions throughout the sensor session.
These steps cannot guarantee that every sensor will remain attached for the entire session, but careful application can help support proper wear.
Can You Restart a Dexcom Sensor?
You should not plan on restarting a Dexcom sensor after its intended session has ended.
Dexcom states that the G7 cannot be restarted after the sensor session is complete.
The same principle applies to the G7 15 Day after its intended session and grace period.
For the G6, Dexcom states that the system is designed for its specified sensor session rather than continued use beyond that period.
Always follow the instructions provided with the specific product you’re using.
How Often Should You Plan to Replace Dexcom Sensors?
Your replacement schedule depends on the model.
Dexcom G6
Plan around a 10-day sensor session.
Dexcom G7
Plan around 10 days of wear plus the 12-hour grace period.
Dexcom G7 15 Day
Plan around 15 days of wear plus the 12-hour grace period.
The 15-day figure is the intended wear period, not a guarantee that every individual sensor will remain in use for the full 15 days.
Keeping track of the date you start each sensor can make it easier to anticipate when your next replacement will be needed.
What Should You Check Before Buying Replacement Dexcom Sensors?
If you’re purchasing replacement sensors online, don’t rely only on the product photograph or a general product name.
Check:
- Exact sensor model
- Sensor type
- Package quantity
- Product description
- Compatibility information
- Packaging details
- Expiration or use-by information where applicable
- Current availability
- Shipping information
This is particularly important because the G7 and G7 15 Day have different intended wear periods.
For example, seeing “Dexcom G7” in a product listing isn’t enough if you specifically need to determine whether you’re purchasing the standard 10-day version or the 15-day version.
Always review the exact product information before completing an order.
What About Dexcom G6 Availability in 2026?
This is particularly relevant for anyone who still uses G6.
Dexcom states that it will no longer manufacture the Dexcom G6 CGM System after July 1, 2026. Dexcom also says supplies may continue to be available through pharmacies or medical distributors for a period after that date, but availability is not guaranteed.
Since it is now 2026, anyone looking for G6 replacement supplies should pay close attention to current availability and the exact product information rather than assuming G6 supplies will remain continuously available.
If you’re considering a different Dexcom system, make sure you confirm compatibility with your existing devices before making a purchase.
A Simple Dexcom Sensor Replacement Checklist
Before ordering your next sensor, review:
- Exact sensor model confirmed
- Expected wear period confirmed
- Grace period understood where applicable
- Compatibility checked
- Package quantity checked
- Product details reviewed
- Expiration/use-by information checked where applicable
- Current availability reviewed
- Shipping information checked
- Replacement timing planned
This quick review can help prevent confusion when different sensor models have different wear periods.
How to Plan Your Next Sensor
A simple routine can make replacement planning easier.
Step 1: Record the sensor start date
Write down the date you start your sensor.
Step 2: Identify your exact model
Confirm whether you’re using G6, standard G7, or G7 15 Day.
Step 3: Note the expected replacement window
Use the intended wear period for your specific model instead of assuming every Dexcom sensor has the same lifespan.
Step 4: Check your remaining supplies
Make sure you have the supplies needed for your next sensor change.
Step 5: Review the replacement product
Before ordering, confirm the model, package information, compatibility, availability, and shipping details.
This can make recurring CGM supply planning more organized.
Shop for Dexcom and Other Diabetic Supplies Online
Understanding how long Dexcom sensors last can help you plan replacement timing and make more informed decisions when purchasing your next supplies.
Affordable Diabetic Direct offers diabetic supplies online, including Dexcom and other CGM supplies, test strips, insulin pump supplies, lancets, and pen needles.
Before placing an order, review the exact product model, package information, compatibility, availability, and shipping details.
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Frequently Asked Questions
How long do Dexcom sensors last?
It depends on the model. Dexcom G6 is designed for up to 10 days, standard Dexcom G7 for up to 10 days plus a 12-hour grace period, and Dexcom G7 15 Day for up to 15 days plus a 12-hour grace period.
How long does a Dexcom G6 sensor last?
A Dexcom G6 sensor is designed to last for up to 10 days.
How long does a Dexcom G7 sensor last?
The standard Dexcom G7 sensor is designed for up to 10 days, followed by a 12-hour grace period.
How long does a Dexcom G7 15 Day sensor last?
The Dexcom G7 15 Day sensor is designed for up to 15 days, followed by a 12-hour grace period.
What does the Dexcom 12-hour grace period mean?
It provides additional time after the normal sensor session ends to replace the sensor. For G7, the normal session is up to 10 days; for G7 15 Day, it is up to 15 days. Both have a 12-hour grace period.
Can I restart a Dexcom G7 sensor?
No. Dexcom states that the G7 sensor cannot be restarted after the sensor session is complete.
Why did my Dexcom sensor stop before the expected wear time?
A sensor may end early because of application problems, adhesion issues, accidental removal, or a sensor-related problem. If you believe your sensor has failed prematurely, follow Dexcom’s support process for assistance.
Is Dexcom G7 15 Day the same as the regular G7?
No. The standard G7 is designed for up to 10 days plus a 12-hour grace period, while G7 15 Day is designed for up to 15 days plus a 12-hour grace period.
Is Dexcom G6 still being manufactured?
No. Dexcom states that G6 manufacturing ended after July 1, 2026. Supplies may remain available for some time, but Dexcom does not guarantee availability after that date.
What should I check when buying replacement Dexcom sensors online?
Confirm the exact sensor model, package quantity, compatibility, product details, expiration or use-by information where applicable, current availability, and shipping information before ordering.
How can I avoid running out of Dexcom sensors?
Keep track of your current sensor’s start date and expected replacement window. Planning your next order before the current sensor session ends can help you avoid last-minute shopping.
Final Takeaway
So, how long do Dexcom sensors last? The answer depends on the model.
The Dexcom G6 is designed for up to 10 days. The standard G7 is designed for up to 10 days plus a 12-hour grace period, while the G7 15 Day is designed for up to 15 days plus a 12-hour grace period.
Because different Dexcom sensors have different wear periods, always check the exact model before purchasing replacement supplies. Review the product details, compatibility, package information, availability, and shipping information before placing your order.
Ready to shop for your next supplies? Browse Affordable Diabetic Direct’s diabetic supplies and choose the products that match your needs.