Shofar Blast Sequence Calculator

The Voice of the High Holidays

The shofar, a ram's horn trumpet, produces one of the most ancient and spiritually evocative sounds in Jewish tradition. On Rosh Hashanah, the Jewish New Year, the shofar is blown in a carefully prescribed sequence that has remained largely unchanged for millennia. The commandment to hear the shofar is considered one of the central mitzvot of the holiday, with the Torah declaring it "a day of teruah (blasting)" (Numbers 29:1). This calculator helps you understand the complete sequence of shofar blasts, the different customs that determine how many blasts are sounded, and the structure of this profound ritual.

The Three Basic Sounds

All shofar blowing consists of combinations of three fundamental sounds. The tekiah is a single, unbroken blast lasting about three seconds. The shevarim consists of three medium-length broken sounds, each approximately one second long, creating a wailing effect. The teruah is a rapid series of nine or more very short staccato blasts, resembling sobbing or alarm. These three sounds form the building blocks of all shofar sequences, combined according to ancient traditions that seek to fulfill the Torah's commandment with certainty despite textual ambiguities about the exact nature of the prescribed sound.

The Uncertainty Principle

The Talmud records a fascinating debate about what the Torah means by "teruah." Rabbi Abbahu of Caesarea, recognizing that different communities had varying traditions, instituted a comprehensive practice: we blow all possible interpretations to ensure fulfillment. The teruah might be the broken wailing of shevarim, the staccato sobbing of what we now call teruah, or a combination of both. Thus, we blow three sets: tekiah-shevarim-teruah-tekiah, tekiah-shevarim-tekiah, and tekiah-teruah-tekiah. Each set is repeated three times, yielding 30 blasts in the core sequence.

The 30 Mandated Sounds

The minimum biblical requirement, as interpreted by Talmudic authorities, is 30 shofar blasts. These are structured as three repetitions each of three different patterns: TaSHRaT (Tekiah-Shevarim/Teruah-Tekiah), TaSHaT (Tekiah-Shevarim-Tekiah), and TaRaT (Tekiah-Teruah-Tekiah). The tekiah that begins and ends each pattern brackets the middle sounds, creating complete units. These 30 sounds are blown during the Torah service after the Torah reading, fulfilling the core obligation before the Musaf prayer begins.

The Hundred Blasts

While 30 blasts fulfill the minimum requirement, the widespread custom is to sound 100 blasts over the course of the Rosh Hashanah service. This expanded practice emerged for several reasons: to confuse the Satan (the accusing angel), to demonstrate our love of the mitzvah by performing it abundantly, and to ensure that all present have certainly fulfilled their obligation even if distracted during earlier blasts. The additional 70 blasts are distributed throughout the Musaf prayer, with different customs determining exactly when and how many are sounded at each point.

Structure of the Hundred

The 100 blasts typically divide as follows: 30 after the Torah reading (the mandated minimum), 30 during the silent Amidah of Musaf, 30 during the repetition of the Musaf Amidah, and 10 at the conclusion of services. Some customs vary the distribution, but the total remains 100. The 30 blown during the repetition accompany the three special blessing sections of the Rosh Hashanah Musaf: Malchuyot (Kingship), Zichronot (Remembrance), and Shofarot (Shofar verses), with 10 blasts sounded at each section.

Tekiah Gedolah

The tekiah gedolah, "great tekiah," is an extended final blast sounded at the conclusion of each major section and especially at the very end of the service. While a regular tekiah lasts about three seconds, the tekiah gedolah may be held for nine seconds or longer, depending on the baal tekiah's (shofar blower's) lung capacity and the congregation's custom. This triumphant, sustained note signals the conclusion of the shofar service and creates a powerful emotional climax.

Different Customs

Ashkenazi, Sephardi, and Yemenite communities have slightly different practices regarding shofar sequences. Some communities blow exactly 100 blasts, while others blow 101 or 102. Certain traditions add extra blasts before or after the standard sequences. The calculator allows you to select your tradition to see the exact sequence your community follows. Despite these variations, the core structure of 30 mandated blasts and the goal of reaching approximately 100 total blasts is nearly universal.

Preparing to Blow

The baal tekiah (shofar blower) traditionally recites a blessing before the first set of 30 blasts: "Blessed are You, Lord our God, King of the universe, who has sanctified us with His commandments and commanded us to hear the sound of the shofar." Note the blessing is to "hear" the sound, emphasizing that the mitzvah is fulfilled by listening, not blowing. The congregation, therefore, must listen attentively; even those who cannot blow can fulfill the mitzvah by hearing. A second blessing, Shehecheyanu, thanks God for enabling us to reach this season.

The Makri's Role

Traditionally, a makri (caller) stands beside the baal tekiah and calls out each sound before it is blown. This ensures accuracy, as the sequence is complex and memory lapses could occur. The makri calls "Tekiah!" and the baal tekiah sounds the tekiah. Then "Shevarim-Teruah!" prompts the combined sound, and so forth. This partnership between caller and blower adds a layer of ritual precision and prevents errors that might invalidate the blasts.

Invalid Blasts

Certain errors require the blast to be repeated. If a shevarim sounds like a tekiah (too smooth) or a teruah sounds like shevarim (too few notes), the sound must be redone. If the shofar produces no sound or an indistinct noise, the attempt doesn't count. If a blast is interrupted in the middle, it must be restarted. The calculator counts only valid blasts; any repeats due to errors are not counted toward the total.

The Silent Prayer Blasts

During the silent Amidah of Musaf, 30 blasts are sounded at specific points while the congregation is praying individually. The congregation pauses their silent prayer at the appropriate moments to listen. In some traditions, the blasts are sounded only if the congregation and baal tekiah reach those points simultaneously; otherwise, they are sounded during the repetition only. This integration of shofar with prayer creates a multi-sensory spiritual experience.

Why the Shofar Sounds

The Rambam (Maimonides) explains that the shofar's call carries a profound message: "Awake, sleepers, from your sleep! Arise, slumberers, from your slumber! Examine your deeds, return in repentance, and remember your Creator." The broken, wailing sounds of shevarim and teruah evoke crying and spiritual brokenness, while the straight tekiah represents wholeness and resolution. Together, they mirror the journey of teshuvah (repentance) from fragmentation to restoration.

Using the Calculator

Select your community's custom (Ashkenazi, Sephardi, or other variations) and whether you want to calculate just the mandated 30 blasts or the full service. The calculator displays the complete sequence, breaking down each set into its component sounds, showing the order of all patterns, and totaling the blasts at each stage of the service. You can use this to follow along during services, to teach the sequence to students, or to prepare if you are serving as baal tekiah or makri.

Rosh Hashanah and Yom Kippur

While Rosh Hashanah features extensive shofar blowing, a single tekiah gedolah is traditionally sounded at the conclusion of Yom Kippur, marking the end of the Day of Atonement. This final blast, a week and a day after Rosh Hashanah, bookends the Ten Days of Repentance. The calculator focuses on the Rosh Hashanah service, where the elaborate sequences occur, but notes the Yom Kippur concluding blast for completeness.