Unlike any review you will find online for an electric toothbrush, we calculate the cost of ownership of each brush to you.

We give you a very good idea of what the cost of the electric toothbrush will be, what the cost of replacement brush heads will be and what it will ultimately cost you over the time period for which you will use it.

**Why show the cost of ownership? **

Buying a toothbrush for some is a big decision. Prices of brushes vary considerably. Personal finances and budgets differ.

Whilst brushes have an upfront cost, we often forget how long an electric toothbrush can last and what are the ongoing costs associated with owning one.

We feel that showing the cost of ownership helps decide whether the brush is a worthwhile investment or not.

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Saying a brush is £100 may sound expensive, but spread this over three years and it could be argued to be more cost effective as you have now thought about how long you will actually own this for.

Whether you wish to know about the cost of ownership or decide to use it as a factor in your decision making process is up to you. We offer it in the interest of trying to show and tell you all there is about a product.

**How the cost of ownership is calculated**

Prices of products can vary massively. There are the recommended retail prices and then what the product actually tends to sell for.

Online and high street store prices tend to differ. We therefore look to take the average. We could use the recommended retail price as this is set by the manufacturer and will stay the same, but this is rarely the price that is actually charged and therefore the costings calculated from this would be inaccurate and not reflective of the value you can likely achieve.

Here are the steps we take.

A brush may have an RRP of £69.99 but generally speaking sells online or in the high street for £30-45.

We will take the price in the middle of these two figures, thus £37.50 becomes what we deem the average selling price.

Over 3 years, replacement brush heads will be required every 3 months. That is 12 brush heads required. 1 usually comes supplied with the brush so a further 11 are needed.

Often sold in packs of 4, brush heads may cost somewhere between £10-£14. We would take £12 to be the average and then split this to each brush head. Therefore a brush head is now £3 (£12 divided by 4).

This gives the user a year 1 cost of £37.50 for the brush and then a further £9 for 3 replacement brush heads that year.

In year 2 and 3 a further £12 will be spent each year on brush heads bringing the cost over 3 years to £70.50 This is calculated by adding all the costs together (£37.50 + £9 +£12 + £12).

We base 3 years on 365 days per year, that is 1095 days in total (365 x 3).

We now divide the £70.50 cost by 1095 days to give a daily cost of £0.06p per day.

For examples sake, buying an AA battery powered brush may initially be cheaper, but factor in the cost of batteries over 3 years and the more expensive electric toothbrush actually works out more cost effective.

No other reviews we have seen take this into consideration when in fact ultimately it does have an impact, whether you realise it or not.

If you bought a car, you may think about how much it is worth in 3 years, so why not do the same with a toothbrush. The values spent may be different, but the principles are the same.

**Why 3 years?**

When Electric Teeth launched in 2015, the average working life of an electric toothbrush was about 3-5 years, although many lasted longer.

Taking into consideration that most manufacturer warranties were 2 years in length, 3 years seemed a logical time frame to use as a basis for this cost.

Many brushes did last 4, 5, 6 or more years, resulting in the value of the brush only getting better.

The intention was that this be used as a benchmark for pricing and comparison.

Newer brushes tend to last 5+ years, but we continue to use 3 years as the basis for this calculation to ensure consistency and fair comparison.

**What is not included in the cost of ownership?**

We do not include the cost of charging the electric toothbrush, the toothpaste and water used and any costs associated with shipping the toothbrush or travelling to and from the store to get it.

These costs are impossible to work due to the wide array of variables. Many of these costs would also have a very low impact on the overall cost of brush ownership.

**How accurate are the costs?**

The costs are a guide and should not be relied upon as completely accurate.

Prices change all the time from various suppliers and can be radically different from one day to the next.

Purchasing from the high street can often be more expensive than online, but may be more convenient.

The figures are based on a human calculating costs and are subject to human error.

Figures are rounded to the nearest whole pence or pound where applicable in the interest of not over complicating the results.

The cost of ownership is a guide using average figures based on the reviewers research of a number of prices from different stores at the time of writing.

**DO NOT RELY ON THE COST OF OWNERSHIP AS FACT.**

**I worked out the cost of ownership to be higher?**

This is quite possible. It depends on what figures you are working off for the cost of buying the brush and replacement heads along with the time period over which you calculate them and of course the accuracy to which you are calculating. We generally calculate to the nearest pence or pound.

**Can you compare it to a manual toothbrush or another electric toothbrush?**

We could yes, but as highlighted there are so many variables that it becomes almost impossible to give you an accurate reflection or pricing based on your particular circumstances.

If comparing products reviewed by Electric Teeth, then you can use the provided information in each review as a guide, but be aware these are all subject to change.

**Can you not update the prices and cost of ownership?**

We could yes.

However, it is an impractical task that has limited bearing on the overall conclusion of the review.

The figures are as a guide only and as such in our opinion there little need to change them. We would prefer to make better use of the time taken to complete this task to provide you with more content on other products that could be of greater benefit to you.

**Why do you not include the cost of toothpaste or electric to charge the brush?**

We do not include these as quite simply the figures are very difficult to work out based on the wide ranging variables and our primary content is the review of the toothbrush and not associated products.

The amount of toothpaste in a tube varies from each brand and depending on what type of toothpaste you use. The amount each user actually uses differs. The cost of electric changes from household to household and for how long you leave it on charge for.

We welcome anyone to calculate figures on our behalf and leave comments which could be helpful to other readers

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