# Convert Between Standard Units of Mass

In this worksheet, students will be asked to convert between standard units of mass using metric measures and solve problems using this knowledge.

Key stage:  KS 2

Curriculum topic:   Measurement

Curriculum subtopic:   Convert Between Standard Units

Difficulty level:

### QUESTION 1 of 10

In this activity, you will need to remember the standard conversion of metric measures for mass (weight).

Remember,

1 kg = 1000 g

1000 kg = 1 tonne

For example

To convert from grams to kgs

4000 g = _____ kg

There are 1000 g in a kg so I need to divide 4000 by 1000

4000 g ÷ 1000 = 4 kg

To convert from kg to grams

30 kg = _____ g

There are 1000 g in a kg so I need to multiply 30 by 1000

30 kg x 1000 = 30,000 g

To convert kg to tonnes

8000 kg = _____ tonnes

There are 1000 kg in a tonne, so I need to divide 8000 by 1000

8000 kg ÷ 1000 = 8 t

To convert tonnes to kg

6.56 t = _____ kg

There are 1000 kg in a tonne, so I need to multiply 6.56 by 1000

6.56 t x 1000 = 6560 kg

Can you match each measurement of mass with its equivalent?

## Column B

2500 g
3.15 t
3.92 kg
7800 kg
3150 kg
3920 g
7.8 t
2.5 kg

Can you match each measurement of mass with its equivalent?

## Column B

6.3 kg
1.05 kg
1005 g
11.355 kg
1.02 t
1020 kg
11,355 g
6300 g

A pot weighs 414 g.

How much will 22 pots weigh in kg?

## Column B

6.3 kg
1.05 kg
1005 g
11.355 kg
1.02 t
1020 kg
11,355 g
6300 g

A newborn puppy weighs 510 g.

How much will 13 puppies weigh?

## Column B

6.3 kg
1.05 kg
1005 g
11.355 kg
1.02 t
1020 kg
11,355 g
6300 g

Look at the shopping list below.

What is the total weight of all the items in grams and kg?

 Bananas 1 kg Eggs x 20 2.5 kg Cherries 550 g Chicken 2.8 kg

## Column B

6.3 kg
1.05 kg
1005 g
11.355 kg
1.02 t
1020 kg
11,355 g
6300 g

Look at this shopping list.

This week, the family have guests visiting so will need to double each of the items on the list.

Now, what is the total weight of all the items in grams and kg after each item is doubled?

 Bananas 1 kg Eggs x 20 2.5 kg Cherries 550 g Chicken 2.8 kg

## Column B

6.3 kg
1.05 kg
1005 g
11.355 kg
1.02 t
1020 kg
11,355 g
6300 g

Can you order the different units of mass from lightest to heaviest?

Lightest first.

## Column B

1st
1/2 kg
2nd
901 g
3rd
3/4 kg
4th
1.6 t
5th
2911 g
6th
1 kg 50 g

A postal service has set charges depending on the weight of the item to be posted.

The service charges £6.95 up to 20 kg.

It then charges an additional 20 p for each kg over 20 kg.

Sam wants to send some boxes, the boxes weigh

6.2 kg, 6.0 kg, 8.8 kg and 7.0 kg

Can you choose the 3 boxes that have a total weight nearest to 20 kg and also weigh less than 20 kg?

6.2 + 6.0 + 7.0

6.2 + 6.0 + 8.8

8.8 + 7.0 + 6.0

A postal service has set charges depending on the weight of the item to be posted.

The service charges £6.95 up to 20kg.

It then charges an additional 20p for each kg over 20kg.

Sam wants to send some boxes, each box weighs

6.2 kg, 6.0 kg, 8.8 kg and 7.0 kg

Can you work out the total cost of sending all 4 boxes together?

6.2 + 6.0 + 7.0

6.2 + 6.0 + 8.8

8.8 + 7.0 + 6.0

Can you match each item to its correct weight?

Remember 1000 kg = 1 tonne

## Column B

Rhino
5.8 t
Car
3.4 t
Elephant
5.05 t
Centurion Tank
52 t
• Question 1

Can you match each measurement of mass with its equivalent?

## Column B

2500 g
2.5 kg
3.92 kg
3920 g
3150 kg
3.15 t
7.8 t
7800 kg
EDDIE SAYS
The matching pairs are 2500 g = 2.5 kg 3.92 kg = 3920 g 3150 kg = 3.15 t 7.8 t = 7800 kg How did you do? You'll improve with each question you'll complete.
• Question 2

Can you match each measurement of mass with its equivalent?

## Column B

6.3 kg
6300 g
1005 g
1.05 kg
1.02 t
1020 kg
11,355 g
11.355 kg
EDDIE SAYS
How did you get on this time? The matching pairs are 6.3 kg = 6300 g 1005 g = 1.05 kg 1.02 t = 1020 kg 11,355 g = 11.355 kg Don't panic if you found this difficult! We'll go through lots more together so that you master conversions.
• Question 3

A pot weighs 414 g.

How much will 22 pots weigh in kg?

EDDIE SAYS
To tackle this question, we first needed to multiply 414 g by 22. 414 g x 22 = 9108 g Next, we had to convert to kg, we do this by dividing by 1000. 9108 g ÷ 1000 = 9.108 kg
• Question 4

A newborn puppy weighs 510 g.

How much will 13 puppies weigh?

EDDIE SAYS
To solve this one, we first multiply 510 g by 13. 510 g x 13 = 6630 g Next, we had to convert to kg, we do this by dividing by 1000. 6630 g ÷ 1000 = 6.630 kg Stick with it, hopefully this is becoming less daunting!
• Question 5

Look at the shopping list below.

What is the total weight of all the items in grams and kg?

 Bananas 1 kg Eggs x 20 2.5 kg Cherries 550 g Chicken 2.8 kg

EDDIE SAYS
When adding units of mass together, it is easier to convert all of the units to the same type. The total weight of shopping is 6.85 kg or 6850 g. Take a deep breath, you’ve got this!
• Question 6

Look at this shopping list.

This week, the family have guests visiting so will need to double each of the items on the list.

Now, what is the total weight of all the items in grams and kg after each item is doubled?

 Bananas 1 kg Eggs x 20 2.5 kg Cherries 550 g Chicken 2.8 kg

EDDIE SAYS
When adding units of mass together, it's easier to convert all of the units to the same type. For this question, we can use our answer from the previous question (6.85 kg or 6850 g) and double it. Therefore, the total weight of shopping is 13.7 kg or 13 700 g.
• Question 7

Can you order the different units of mass from lightest to heaviest?

Lightest first.

## Column B

1st
1/2 kg
2nd
3/4 kg
3rd
901 g
4th
1 kg 50 g
5th
2911 g
6th
1.6 t
EDDIE SAYS
You have to look carefully at each unit of measure, especially the ones that included a fraction. The weights in ascending order are... 1/2 kg 3/4 kg 901 g 1 kg 50 g 2911 g 1.6 t
• Question 8

A postal service has set charges depending on the weight of the item to be posted.

The service charges £6.95 up to 20 kg.

It then charges an additional 20 p for each kg over 20 kg.

Sam wants to send some boxes, the boxes weigh

6.2 kg, 6.0 kg, 8.8 kg and 7.0 kg

Can you choose the 3 boxes that have a total weight nearest to 20 kg and also weigh less than 20 kg?

6.2 + 6.0 + 7.0
EDDIE SAYS
The boxes that weigh 6.2 kg, 6.0 kg and 7.0 kg have the closest weight to and are less than 20 kg. When added together, they total 19.2 kg.
• Question 9

A postal service has set charges depending on the weight of the item to be posted.

The service charges £6.95 up to 20kg.

It then charges an additional 20p for each kg over 20kg.

Sam wants to send some boxes, each box weighs

6.2 kg, 6.0 kg, 8.8 kg and 7.0 kg

Can you work out the total cost of sending all 4 boxes together?

EDDIE SAYS
To crack this one, we first have to add the weight of all of the boxes together, 6.2 + 6.0 + 8.8 + 7.0 = 28.0 kg. This shows we are 8.0 kg over the 20 kg limit for the charge of £6.95. We know we have to pay an extra 20 p for every kg over 20 kg. 20 p x 8 = £1.60 We then have to add £1.60 to the original charge of £6.95 £6.95 + £1.60 = £8.55 Great focus! Hopefully, this topic is getting easier for you. One more question and then you can take a well-deserved break.
• Question 10

Can you match each item to its correct weight?

Remember 1000 kg = 1 tonne

## Column B

Rhino
5.05 t
Car
3.4 t
Elephant
5.8 t
Centurion Tank
52 t
EDDIE SAYS
A tonne is a heavyweight unit of measure. 1000 kg = 1 tonne. The correctly matched pairs are Rhino = 5.05 t Car = 3.4 t Elephant = 5.8 t Centurion tank = 52 t Practise makes perfect! That’s another activity ticked off!
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