Important things to know when hatching eggs:

soulbruva3:

bestofpokemongo:

• The maximum speed you can go and still gain credit towards hatching your eggs is 10.5 kmph.
• The game does not measure your exact speed; it measures the distance you have travelled every minute. This means the maximum distance you can walk in a minute is 175meters. 
• The most efficient way to hatch your eggs is to walk in a straight line, the game “draws a line” from where you were to where you are now and measures that distance. So, obviously a person walking in a zigzag pattern will get less distance towards hatching their egg.
• The distance displayed on the egg only updates every 4 minutes.
• The game still counts your distance if you are still moving when you are catching a pokemon

THIS HELPS SO MUCH!