Kaitirotiro Rā o te Whakahauhautanga
E whakatauria ana te rā o te whakawhanaketanga mai i te rā e hiahiatia ana, i tōna wā whakamutunga rānei.
Ka whakahōutia ngā hua i te wā e tātuhi ana.
Mo tēnei tātaitai
A conception calculator estimates when conception likely occurred. From a due date it counts back 266 days (38 weeks), because fertilization happens about two weeks after the last period on a standard 28-day cycle and pregnancy runs 280 days from that period. From a last-period date it counts forward to ovulation (cycle length minus 14 days). Because sperm survive several days, a likely conception range is shown around the central date.
Working from a due date, subtract 266 days: a due date of, say, 40 weeks out places conception 38 weeks earlier, with the last period roughly two weeks before that (due date minus 280 days). Working from your last period, it adds cycle length minus 14 to find ovulation — day 14 on a 28-day cycle, day 16 on a 30-day cycle. It then shows today’s gestational age, measured from the last period rather than conception.
Use it to trace back roughly when a pregnancy began, either out of curiosity or to line up dates with a due date. The several-day range reflects that sperm can survive up to about five days, so conception may follow intercourse by a few days. Actual ovulation varies, so an early dating ultrasound is the most reliable check; this tool is for information, not medical advice.
Ko nga pātai e pā ana
He pēhea te whakatau i te whakawhanaketanga mai i te rā e hiahiatia ana?
Ko te rā o te whakawhanaketanga ko te 280 rā (40 wiki) i muri i te wā o te hākari whakamutunga, ā, tata ki te 14 rā i muri i taua wā, ā, ko te whakawhanaketanga tata ki te rā o te whakawhanaketanga, he iti iho i te 266 rā (38 wiki).
He aha te whakaaturanga o te awhe whakaaro, ehara i te rā kotahi?
Ka taea e te tārai te ora tae noa ki te rima rā i roto i te pūtau whakawhanaketanga, nō reira ka taea e te pāpāhotanga ētahi rā i mua i te whakawhanaketanga te whakawhanake tonu i te māna.
He ōrite te rā o te whakawhanaketanga ki te rā o te pāpāhotanga?
Kāore i te tika. Ka puta te whakawhanaketanga (whakapānga) ina tūtaki te tārai ki te huaketo i te wā o te whakawhanaketanga, tērā pea i ētahi rā i muri i te pāpāhotanga. Ko te whakatau tata e arotahi ana ki te whakawhanaketanga, te wā koiora o te whakawhanaketanga.
I te wā e whakawhanake ana ahau mēnā e mōhio ana au ki te rā o te whakawhanaketanga?
Ka tangohia te 266 rā (38 wiki) mai i te rā i whakaritea ai. Nā te mea ko te hāpai e whakarārangi ana hei 280 rā mai i te wā whakamutunga, ā, tata ki te 14 rā i muri mai, ka tae te whakawhanake ki te wiki e rua i muri i taua wā.
Ka taea e te tātaitai whakawhanake te kī ki a au ko wai te pāpā?
He iti noa iho. Ka hoatu e ia he rā tūpono o te whakawhanaketanga me te matapihi o ētahi rā i te wā o te whakawāteatanga, engari nā te mea ka ora te tārai i ētahi rā, kāore e taea te whakatau te pāpāhotanga mai i ngā rā anake, ā, e hiahiatia ana he whakamātau DNA.
He aha te take i rua wiki te whakawhanake i muri i te wā whakamutunga?
Ko te hāpai e whakarārangitia ana mai i te rā tuatahi o te wā whakamutunga mō te ngāwaritanga, engari ka puta te whakawāteatanga i te wā o te whakawāteatanga, tata ki te rua wiki i muri mai, nā reira ko te pakeketanga e whakaatu ana tēnei utauta e rua wiki neke atu i te wā mai i te whakawhanaketanga.
API — whakamahi tēnei tātaitai mai i te waehere
E kī ana tēnei tātaitai hei wāhi mutunga kore JSON - kāore he kī e hiahiatia ana. Ka tukuna ngā uara āpure i raro nei hei tohutoro pātai, JSON rānei. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Ka pānui te papatono API katoa →
Whakamutunga
GET https://calculator.free/api/v1/conception/curl
curl "https://calculator.free/api/v1/conception/?mode=due&due=2027-01-06&lmp=2026-08-09"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/conception/?" + new URLSearchParams({
"mode": "due",
"due": "2027-01-06",
"lmp": "2026-08-09"
}));
const data = await r.json();
console.log(data.results);Ko ngā hua he whakataunga mō te tohutohu ahuwhānui anake, ehara i te tohutohu moni, rongoā, tāke rānei.