無料&即時 — 登録不要でご利用いただけます

Kill Death Ratio Calculator

Calculate your kill/death ratio (KD), kill/death/assist ratio (KDA), and other combat performance metrics for any competitive game. Enter your match stats to track improvement, compare with friends, and understand where your gameplay stands — from casual matches to ranked competitive play.

Kill Death Ratio Calculator — リアルタイム比率プレビュー
KDR Stats
—
A
B
⚖️
Proportion Solver
A : B = C : D — Enter any 3 values
:
=
:
📊
Results
Visual ratio breakdown
Solved Proportion
—
Simplified
—
Percentages
—
Decimal
—
Fraction
—
Visual Ratio
A
B
Part A: —
Part B: —
    ✨
    Ratio Simplifier
    Reduce any ratio to its simplest form
    :
    📊
    Simplified Result
    Reduced to lowest terms
    Simplified Ratio
    —
    GCD Used
    —
    Percentages
    —
    Decimal Ratio
    —
    Fraction
    —
    Visual Ratio
    A
    B
    Part A: —
    Part B: —
      📐
      Ratio Scaler
      Multiply a ratio by a scale factor
      :
      ×
      📊
      Scaled Result
      Ratio after scaling
      Scaled Ratio
      —
      Original
      —
      Factor
      —
      Percentages
      —
      Simplified
      —
      Visual Ratio
      A
      B

        🕐 Recent Calculations

        📭
        No calculations yet. Start computing above!

        What is Kill Death Ratio?

        The kill/death ratio (KD or K/D) is the most widely used performance metric in competitive gaming, calculated by dividing your total kills by total deaths. A KD of 1.5 means you secure 1.5 kills for every time you are eliminated. A ratio above 1.0 indicates you get more kills than deaths on average — a fundamental benchmark of combat effectiveness in first-person shooters and battle royale games.

        Many modern games also track the KDA ratio (kills + assists divided by deaths), which gives a more complete picture of your contribution to team fights. A player with a 0.8 KD but high assist count may have a 2.5 KDA, reflecting strong team play even without top fragging. Understanding both metrics helps you evaluate performance beyond just kill counts.

        使用される計算公式・方程式

        この計算ツールは5つの主要な公式を使用しています:

        1 Kill Death Ratio ▼
        KDR = Total Kills / Total Deaths

        1500 kills and 1000 deaths: KDR = 1500/1000 = 1.50.

        2 Kills Needed for Target KDR ▼
        Kills Needed = (Target KDR × (Deaths + Future Deaths)) - Current Kills

        To reach 2.0 KDR with 1000 kills and 800 deaths (no more deaths): Need 2.0 × 800 - 1000 = 600 more kills.

        3 KDA Ratio (with Assists) ▼
        KDA = (Kills + Assists) / Deaths

        Including assists gives a more complete picture. 1500 kills + 500 assists / 1000 deaths = 2.0 KDA.

        Explore all calculation options on the 比率計算ツール home page.

        比率計算ツールの使い方

        この比率計算ツールは、以下の3ステップで簡単にご利用いただけます:

        1

        数値を入力

        入力欄に既知の比率の値を入力します。求めたい未知数の入力欄は空欄のままにしておきます。

        2

        モードを選択

        比率モード(解く、簡素化、スケーリング)を選択します。各モードで異なる計算式が適用されます。

        3

        結果を確認

        計算するボタンを押します。結果画面に答えと、視覚的な比率バー、円グラフ、詳細なステップバイステップの解決プロセスが表示されます。

        実例問題と段階的な解説

        本比率計算ツールを使って、以下の3つの例題をステップバイステップで解決するプロセスです:

        入力 1 Player with 2400 kills and 1600 deaths
        1 Identify total kills (2,400) and total deaths (1,600).
        2 Divide kills by deaths: 2,400 ÷ 1,600 = 1.50.
        3 Express as KDR.
        ✓ Kill/Death Ratio (KDR) is 1.50
        入力 2 How many kills to raise KDR from 0.8 to 1.0?
        1 Given: Current Kills = 80, Current Deaths = 100 (KDR = 0.80).
        2 For Target KDR = 1.00 with 0 additional deaths:
        3 Required Total Kills = 1.00 × 100 = 100 kills.
        4 Kills needed without dying: 100 - 80 = 20 kills.
        ✓ Need 20 consecutive kills without dying
        入力 3 Session analysis: 45 kills, 30 deaths, 20 assists
        1 Standard KDR = 45 ÷ 30 = 1.50.
        2 Calculate KDA (Kills + Assists/2) / Deaths: (45 + 10) ÷ 30 = 55 ÷ 30 = 1.83.
        3 Full KDA (K+A)/D: (45 + 20) ÷ 30 = 65 ÷ 30 = 2.17.
        ✓ KDR is 1.50 | Adjusted KDA is 2.17

        よくある質問 (FAQ)

        What is a good KD ratio? ▼

        In most competitive FPS games, a KD above 1.0 is average (you get more kills than deaths). 1.2-1.5 is above average. 1.5-2.0 is skilled. 2.0+ is elite. However, these benchmarks vary by game — a 1.5 KD in ranked Valorant is more impressive than 1.5 in casual Call of Duty lobbies.

        How is KD ratio calculated? ▼

        KD = Total Kills ÷ Total Deaths. If you have 1,500 kills and 1,000 deaths, your KD is 1.50. For KDA: (Kills + Assists) ÷ Deaths. With 1,500 kills, 800 assists, and 1,000 deaths, KDA = 2.30.

        What is the difference between KD and KDA? ▼

        KD only counts kills and deaths. KDA includes assists in the numerator: (Kills + Assists) ÷ Deaths. KDA is a better measure of overall combat contribution, especially in team games where support players deal damage without getting the final kill.

        Does KD matter in battle royale games? ▼

        Yes, but placement matters more for ranking. Battle royale KD is typically lower than TDM because many players die early with 0-1 kills. Average KD in Warzone/Fortnite is around 0.8-1.0. A 2.0+ BR KD is considered very strong. Wins per match is often a more relevant metric.

        How do I improve my KD ratio? ▼

        Focus on: (1) positioning — use cover, hold angles, avoid open areas; (2) map knowledge — learn common routes, power positions, and spawn locations; (3) aim training — practice in aim trainers daily; (4) game sense — learn when to engage and when to disengage; (5) reviewing deaths — watch replays to identify recurring mistakes.

        Does dying in a game always count toward KD? ▼

        In most FPS games, every death counts. In some battle royale games, dying early and being respawned (like Apex Legends) may or may not count depending on the game's tracking system. Suicides and environmental deaths usually count as deaths but not as kills for any opponent.

        What KD do professional gamers have? ▼

        Professional FPS players typically maintain KDs between 1.5 and 3.0+ in competitive matches against other professionals. In public matches, their KDs can exceed 4.0-5.0. However, pros prioritize win rate and objective play over KD padding.

        How many games does it take to stabilize my KD? ▼

        Your KD becomes a reliable performance indicator after approximately 100-200 games. Below that, individual matches have too much impact on the overall ratio. After 500+ games, your KD is very stable and difficult to change significantly without genuine skill improvement.

        Is a negative KD ratio possible? ▼

        No. KD ratio cannot be negative because kills and deaths are always non-negative numbers. The minimum KD is 0 (zero kills with one or more deaths). However, if you have 0 deaths, your KD is technically undefined (division by zero) — most games display it as your kill count or infinity.

        How does SBMM affect KD ratio? ▼

        Skill-Based Matchmaking (SBMM) places you against similarly skilled opponents, which naturally pushes everyone's KD toward 1.0 over time. Strong SBMM systems make high KDs much harder to maintain because you rarely face weaker opponents. A 1.3 KD in strict SBMM is equivalent to 2.0+ without it.

        Should I track KD per session or overall? ▼

        Both. Session KD shows your current form and daily performance trajectory. Overall KD provides the big picture of your skill level. Tracking both helps you identify whether you are improving (session KD consistently higher than overall) or declining (session KD consistently lower).

        比率の理論を学ぶ

        比率とは具体的に何ですか?

        比率とは、2つ以上の数量の大きさを互いに比較して相対的な割合を表した数値です。記号では A : B のように表し、「Aの量に対してBの量が対応する」という相互関係を意味します。例えば、3 : 4 の比率は、Aが3つ分配されるときBは4つマッチするという正比例関係を持ちます。料理、工学設計、財務分析など日常のあらゆる場面で使われます。

        比例式はどのように解きますか?

        比例式は、2つの比率の値が等しいことを表す等式です(A : B = C : D)。外項の積(A × D)と内項 of 積(B × C)は常に等しくなります。未知数 D を求めるには、内項の積を求め、それをもう一方の外項 A で割ります: D = (B × C) / A。当ツールの比例式解決モードに既知の3つの数値を入力すれば、未知数を即座に算出できます。

        比率はどのように簡単に整理しますか?

        2つの数値の最大公約数(GCD)を求めた後、両方の数値をその最大公約数で割って約分します。例えば 24 : 36 の場合、24と36の最大公約数が 12 なので、両方を 12 で割ると最も簡単な自然数の比である 2 : 3 になります。比率計算ツールがGCDの算出と約分を自動的に処理します。

        比率のスケーリングはいつ使用しますか?

        比率の関係を崩さずに全体の分量を増やしたり減らしたりするときに使用します。例えば、2 : 5 の割合の材料があるとき、両方に 3 を掛ければ 6 : 15 になり、同じ比重を保ったまま3倍の量の配合物を準備することができます。パン生地の容量変更や、図面の縮尺変更に欠かせません。

        比率と分数の違いは何ですか?

        比率(A : B)は同等の要素同士の大きさの比較(部分対部分)に適しており、分数(A/B)は全体の中である要素が占める割合(部分対全体)を表現することが多いです。ただし、比率 3 : 4 も分数 3/4(小数で0.75)として表現できます。使われる文脈や意味合いにおいてニュアンスの違いがあります。