How long does God's anger last?

God doesn't get angry.

God will not threaten like man, nor be inflamed to anger. Judith 8:15

God's anger lasts for just a moment.

For his anger endureth but a moment. Psalm 30:5

God's anger lasts a long time.

And the Lord's anger was kindled against Israel, and he made them wander in the wilderness for forty years. Numbers 32:13

God's anger doesn't last forever.

I am merciful, saith the Lord, and I will not keep anger for ever. Jeremiah 3:12

He retaineth not his anger forever, because he delighteth in mercy. Micah 7:18

God's anger lasts forever.

Ye have kindled a fire in mine anger, which shall burn for ever. Jeremiah 17:4

The people against whom the LORD hath indignation for ever. Malachi 1:4

Depart from me, he cursed, into everlasting fire, prepared for the devil and his angels. Matthew 25:41

And these shall go away into everlasting punishment. Matthew 25:46