How long do you have before a grenade blows up? (2023)

How long do you have until a grenade explodes?

Most grenades will detonate about 3-5 seconds after the trigger is released, giving you a few critical moments to react. The kill radius from a grenade's explosion is about 15 feet, and the casualty radius is about 50 feet, though pieces of shrapnel can still fly much farther than that.

As for the amount of time it is advised to cook a grenade before throwing it, every official source we consulted notes that 2 seconds is the absolute maximum amount of time a soldier is advised to hold onto a live grenade before throwing it, with emphasis on MAXIMUM.

For as long as you want, it wont do anything until you let go of the grenades safety lever, that is when it is set to detonate. Though when you do let go, it usually takes from a couple to up to 5 or 6 seconds to explode.

To cook off a grenade, pull the pin, release the lever, count to "one one thousand" or "two one thousand," then throw. Most combat grenades have a four or five second fuse, so don't cook off your grenade for more than one or two seconds unless you're positive its fuse is longer.

Such an act can be survivable: in World War II, U.S. Marine Jack Lucas, in the Battle of Iwo Jima, placed two grenades under his steel M1 helmet and himself before they exploded. Lucas lived, but spent the rest of his life with over 200 pieces of shrapnel in his body.

The casualty radius of a grenade is between 5 and 20 meters; with a minimum of 50% of exposed personnel becoming casualties within a radius of around 15 metres from the blast. A single grenade can kill an individual up to 10 metres away and can cause serious injuries up to 20 metres away.

Pulling the pin on a grenade is easy, but it's not that easy. If you plan to pull the pin with your teeth, set up a dental appointment because you're going to rip at least three pearly whites from your mouth. Just slow down and pull it with your hand, Rambo.

military applications

Such grenades usually weigh no more than 2 pounds (0.9 kg).

Factually- yes. Most all hand grenades utilize a timed fuze, detonating a measured number of seconds after the pin is pulled. Because of this, there is nothing that physically stops you from grabbing that grenade and throwing it back.

FRAG OUT! The grenade is a fragmentation grenade, because when it blows up it throws fragments through the air, hence the term “FRAG OUT.” This phrase is yelled loud for all others in the unit to hear. Once you throw the grenade, hit the deck.

What is the best thing to do when a grenade is thrown at you?

Regardless of whether you're on land or in water, your best chance against all that is to get as far as possible away from the grenade, lie down, and face your feet towards it.

Anyone who covers a grenade with their kevlar is going to be severely wounded. And, chances are, Dunham would probably have been killed by the grenade regardless due to his proximity. But his helmet likely absorbed all of the grenade's shrapnel and allowed his fellow Marines to come out relatively unscathed.

The Army record for the grenade throw was set by Al Blozis in 1944 with a throw of 284.54 feet.

“Hooah, Sarge.”

However, an underwater explosion transmits pressure with greater intensity over a longer distance. If you stood outside of shrapnel range for an exploding hand grenade, you'd likely remain unharmed. If you stood at the same range to an underwater explosion, the pressure wave would probably kill you [source: Landsberg].

No, being underwater will not save you from a grenade explosion. The explosion will cause the same damage to your body whether you are on land or underwater.

In space, it would become nearly a spherical blast, but the format will vary significantly with the grenade shape. Yes, it would. It contains a chemical explosive that doesn't require an atmosphere. The fragments would fly even farther with no friction from air to slow them down.

A study last month found that the countries with the best hope of at least seeing their civilisation survive during the ten years after a nuclear war would be Argentina and Australia.

Any nuclear explosion creates radiation, heat, and blast effects that will result in many quick fatalities. Direct radiation is the most immediate effect of the detonation of a nuclear weapon. It is produced by the nuclear reactions inside the bomb and comes mainly in the form of gamma rays and neutrons.

At a distance of 40-45 miles, a person would have at most 3 hours after the fallout began to find shelter. Considerably smaller radiation doses will make people seriously ill. Thus, the survival prospects of persons immediately downwind of the burst point would be slim unless they could be sheltered or evacuated.

Can a pin go back in a grenade?

Yes, a grenade's safety pin can be put back as long as the strike lever hasn't been released. A grenade is actually activated by the strike lever (also known as "spoon").

However, the most bizarre thing about grenades in movies is pulling out the pin with teeth – that is pretty much impossible. The end of the pin is usually spread wide apart. This ensures that the pin will not be yanked out accidentally and will not simply fall out.

The military no longer teaches cooking off grenades and soldiers are not supposed to attempt it. Cooking off a grenade means releasing the spoon (which starts the delay) but then holding onto the grenade for 1-2 seconds longer before throwing it. A grenade typically has a delay of 2.5-5 seconds.

The grenade is thrown and explodes after a roughly 1.5-second delay. The explosion of magnesium-based pyrotechnic chemicals causes a very bright flash and a loud sound (160−180 decibels), which can cause temporary blindness, temporary loss of hearing and loss of balance, as well as a sense of panic.