Mosquito Life Cycle Calculator: Egg to Adult in Days

Mosquito life cycle: the 4 stages

Every mosquito goes through complete metamorphosis, like a butterfly. The mosquito life cycle stages are egg, larva, pupa and adult, and the first three all happen in water — which is why standing water is the key to controlling mosquitoes (CDC). Here is what happens at each stage:

1. Egg. A female lays her eggs on or near water after a blood meal. Most hatch within 24–48 hours of being in water (AMCA); Aedes eggs can wait for months on a dry container wall until rain or a sprinkler covers them (CDC).
2. Larva ("wiggler"). The larva lives in the water, hanging from the surface to breathe and feeding on algae and tiny organisms (UF/IFAS). It moults four times — four instars — and lasts 4–14 days depending on water temperature (AMCA).
3. Pupa ("tumbler"). A comma-shaped resting stage that doesn't feed, lasting 1–4 days (AMCA); about two days for the yellow fever mosquito (UF/IFAS).
4. Adult. The adult splits the pupal skin at the water surface and flies off. Females mate, feed on sugar, take a blood meal and lay the next batch of eggs.

In warm water the whole mosquito life cycle takes about a week. The CDC gives 7–10 days from egg to adult for Aedes and Culex mosquitoes and 10–14 days for Anopheles. The calculator above turns that into dates for your own water temperature.

How long is the mosquito life cycle?

How long is the mosquito life cycle from egg to flying adult? Water temperature decides it. Cool water slows everything down; warm water speeds it up, until it gets so hot that the larvae die. In lab studies, yellow fever and Asian tiger mosquito larvae took about 32–37 days to become adults at 15 °C (59 °F) but only 7.6–12 days at 30 °C (86 °F); at 40 °C none survived (Doeurk et al. 2025).

These mosquito life cycle days add 1–2 days for the eggs to hatch (AMCA) to the measured hatch-to-adult times: Aedes from Doeurk et al. (2025) and Marini et al. (2020), which also tabulates Delatte et al. (2009); Culex from Ciota et al. (2014), which reported 18–29 days at 16 °C, 9 days at 28 °C and 8 days at 32 °C; Anopheles from Christiansen-Jucht et al. (2015), measured at 23 and 31 °C. No Anopheles adults emerge below 18 °C or above 34 °C (Bayoh & Lindsay 2003).

So how long is mosquito life cycle in a summer garden? About a week to ten days for container mosquitoes in warm water — just as the CDC says — and two to five weeks in cool spring water. At 25 °C (77 °F) the calculator gives 11–16 days across all three types.

Mosquito eggs: where they're laid and how long they last

Where do mosquitoes lay eggs? Each group has its own habit, and knowing it tells you where to look:

• Aedes (yellow fever and Asian tiger mosquitoes) lay their eggs singly on the inner walls of containers with water, just above the waterline (CDC) — buckets, tyres, planters, toys, bird baths, flowerpot saucers. The eggs stick like glue.
• Culex lay eggs in floating rafts of 100–300 on still water: ponds, ditches, storm drains, neglected pools and the same containers around homes (CDC).
• Anopheles lay 50–200 eggs at a time, singly on the water, often in marshes or at the edges of shallow creeks (CDC).

How long does it take mosquito eggs to hatch?

Usually one to two days once they're in water: "tiny mosquito larvae (1st instar) emerge from the eggs within 24–48 hours almost in unison" (AMCA). In a lab study of malaria mosquitoes, eggs hatched after about 1–2 days at 23–31 °C (Christiansen-Jucht et al. 2015). Aedes eggs are different because they can wait: they hatch when water covers them, which may be the same week or several months later (CDC).

How long can mosquito eggs survive without water?

For Aedes, a long time. CDC says Aedes "eggs can survive drying out for up to 8 months", and UF/IFAS says yellow fever mosquito eggs "can survive desiccation for months and hatch once submerged in water". Culex and Anopheles eggs, by contrast, are "susceptible to drying out" (AMCA) — Anopheles eggs "do not tolerate drying out" (CDC). That's why mosquito eggs of container species must be scrubbed off, not just tipped out. In cold climates the Asian tiger mosquito spends the whole winter as these dry eggs (Suman et al. 2015), and diapaused eggs from Europe survived long spells at −10 °C (Thomas et al. 2012).

Mosquito larvae and pupae (wigglers and tumblers)

Mosquito larvae are the small, wriggling "wigglers" you see jerking up and down in a bucket of rainwater. They hang just under the surface to breathe and dive when disturbed. They feed on organic particles, algae and microscopic organisms in the water (UF/IFAS), growing through four instars. The yellow fever mosquito spends only a short time in the first three and up to three days in the fourth (UF/IFAS); in cool water, larvae can stay in that stage for months as long as the water lasts.

Mosquito pupae, the "tumblers", are comma-shaped and tumble away from danger. They don't feed, and they last 1–4 days depending on species and temperature (AMCA) — about two days for the yellow fever mosquito (UF/IFAS). When the adult is ready, it splits the pupal skin at the surface and stands on the water while its wings harden.

How long for mosquito larvae to become adults?

In lab studies, the whole larva-plus-pupa stage took about 10–14 days at 25 °C for Aedes mosquitoes: roughly four-fifths of it as a larva and one-fifth as a pupa (Doeurk et al. 2025). Warm water roughly halves the time compared with 20 °C; cold water at 15 °C stretches it to about a month. The calculator's timeline shows each stage with its dates.

Aedes vs Culex vs Anopheles life cycles

The three main groups of mosquitoes follow the same four stages but in different places, and that changes how you control them:

Sources: CDC life-cycle pages for each group; AMCA; Suman et al. (2015) and AMCA for winter. For how long each kind lives once it's an adult, see the mosquito lifespan calculator.

How often should you empty standing water?

At least once a week. The CDC's advice — often called tip and toss — is: "Once a week, empty and scrub, turn over, cover, or throw out any items that hold water like tires, buckets, planters, toys, pools, birdbaths, flowerpot saucers, or trash containers." The same goes for indoor items such as vases and flowerpot saucers (CDC). The EPA likewise says to empty and change bird bath water at least once a week and to get rid of standing water in rain gutters, old tyres and buckets.

Why a week? Because the fastest egg-to-adult time in warm water is just over a week. Empty a container every seven days and no larva in it has time to finish. In the hottest weather the margin gets thin — at 35 °C the fastest Aedes in the lab took about 8.8 days from egg to adult — so the calculator's standing-water mode checks your water temperature and shortens the interval if it ever needs to.

• Scrub, don't just pour: Aedes eggs stay glued to the walls above the waterline (CDC).
• Turn over buckets, toys and wheelbarrows so they can't fill with rain (CDC).
• Cover water storage — rain barrels, cisterns, buckets — tightly (CDC).
• Clear gutters so water can't pool in them (EPA).
• Throw out or store old tyres under cover; waste tyres collect water that attracts mosquitoes (EPA).

Permanent water you can't empty, such as an ornamental pond, is a different case: Texas A&M AgriLife suggests stocking mosquito fish or other fish species that eat the larvae. For small containers, tipping and scrubbing is simplest.

How this mosquito life cycle calculator works

Life cycle timeline. The calculator adds 1–2 days for the eggs to hatch (AMCA) to the measured larva-plus-pupa time at your water temperature, and dates each stage from the day the water was left standing (or today):

• Aedes: hatch-to-adult times at 15–35 °C for the yellow fever and Asian tiger mosquitoes (Doeurk et al. 2025) and Asian tiger mosquitoes from Italy and Réunion (Marini et al. 2020, including Delatte et al. 2009). Where studies differ, you see the range.
• Culex: 18–29 days at 16 °C, 9 at 28 °C and 8 at 32 °C (Ciota et al. 2014), with straight lines between.
• Anopheles: 10.9 days at 23 °C and 12.4 at 31 °C (Christiansen-Jucht et al. 2015); between 18 and 34 °C the nearest measured value is used, and outside it no adults emerge (Bayoh & Lindsay 2003).
• Stages: the larva-plus-pupa time is split about 80:20 between larva and pupa, the ratio measured for yellow fever mosquitoes at 25 °C (Doeurk et al. 2025), using the same stage-sharing engine as our fruit fly life cycle tool.

Standing water schedule. The interval is the CDC's weekly rule, shortened to one day less than the fastest sourced egg-to-adult time if that ever drops below eight days, plus container-specific advice from the CDC and EPA. Dates are rounded to the nearest day; future dates for "water left standing" are rejected.

Frequently asked questions

These calculators give estimates for education. Real flies vary with strain, food, humidity and temperature. For a stubborn infestation, your local cooperative extension service can help identify the insect. We give no pesticide advice.